Aspose.PDF FOSS for .NET

API reference for Aspose.Pdf FOSS for .NET v26.7.0. 854 public types organized by module.

Core API

Class	Description
`BaseOperatorCollection`	Standalone operator-list class — surface mirrors OperatorCollection but is detached from any page.
`BuildVersionInfo`	Build and version information for the library.
`CollectionItem`	Per-file metadata entries declared by a portfolio /Collection’s schema, exposed as a typed dictionary on CollectionItem.
`ContentsAppender`	Buffers operators to prepend to / append to a page’s content stream.
`Document`	Represents a PDF document.
`DocumentCollection`	Class with 2 methods and 1 property.
`DocumentInfo`	Represents the document information dictionary.
`EmbeddedFileCollection`	Collection of embedded files in a document.
`EncryptedPayload`	Wraps the /EP entry on an embedded-file file-spec — the encrypted-payload that signals a PDF 2.0 unencrypted-wrapper document.
`EngineDocFacade`	Wrapper providing the small slice of engine-level state callers may set via doc._engineDoc.X.
`ExtGStateValue`	One /ExtGState entry — name plus stroke/fill alpha factors.
`FileParams`	Wraps the /Params dict on an embedded-file stream (PDF §7.11.3 Table 46).
`FileSpecification`	Represents an embedded file specification (PDF §7.11.3).
`Group`	Group / blending colour space dictionary (PDF 32000 §11.6.5).
`Image`	Image compositing can be customized using the BlendMode enumeration, which includes common blend operations such as Multiply and Screen.
`ImagePlacement`	Represents an image placement found on a PDF page — the position, size, and resolution of an image XObject as it appears on the page (after CTM transformation).
`ImagePlacementAbsorber`	Absorbs image placement information from PDF pages.
`ImagePlacementCollection`	A collection of ImagePlacement items.
`ImageStamp`	Adds an image to a PDF page.
`InterruptMonitor`	Class with 1 method.
`JavaScriptCollection`	Document-level JavaScript scripts (PDF spec §12.6.4.16).
`LaunchActionOperationConverter`	LaunchActionOperationConverter converts a LaunchActionOperation value to its string representation via ToString, exposing the strings strOpen and strPrint.
`Layer`	A PDF layer (Optional Content Group) as exposed through Layers.
`MergeOptions`	Merge tuning knobs honored by Merge(MergeOptions, Document[]) and friends.
`OcspSettings`	OCSP (Online Certificate Status Protocol) settings for the signer’s revocation-check / OCSP-stapling path.
`Operator-Pdf`	Top-level base for all PDF content-stream operators.
`OperatorCollection`	Collection of content stream operators for a page.
`Opi`	Open Prepress Interface (OPI) metadata wrapper for an XForm.
`OptimizationOptions-Pdf`	Document-scoped alias for OptimizationOptions.
`Page`	Represents a page in a PDF document.
`PageActionCollection`	Per-page additional actions (PDF 32000 §12.6.3 /AA entries).
`PageExtensions`	Extension methods over Page that manipulate the page content stream.
`PageInfo`	Container for page dimension and margin properties.
`PageResources`	Provides access to a page’s resource collections (fonts, images).
`PageTransition`	Represents a page transition effect (PDF32000 §12.4.4).
`RawOperator`	An unparsed operator token from a content stream — used as a fallback for operators not covered by the typed Operators hierarchy.
`RepairOptions`	Options describing what repair is needed.
`Resolution`	Represents the resolution (DPI) for device rendering and image placement.
`Resources`	Type alias for PageResources, matching the Resources class name.
`Stamp-Pdf`	Top-level Aspose.Pdf-shape abstract base for stamps applied to a Page via AddStamp(Stamp).
`TextStamp-Pdf`	Compat re-export so external tests that reference Aspose.Pdf.TextStamp (from before the type moved to Aspose.Pdf.Stamps) keep compiling.
`TimestampSettings`	RFC 3161 Time-Stamp Authority (TSA) settings consumed by the signer when embedding a timestamp token into the PKCS#7 envelope.
`Value`	One typed value pulled out of a CollectionItem dict by TryGet*Value.
`WarningInfo`	Class with 2 methods and 3 properties.
`Watermark`	Watermark applied to a page.
`XForm`	Represents a Form XObject (reusable content stream with its own resources).
`XFormCollection`	Collection of XForm (Form XObject) resources on a page.
`XFormResources`	Resources (fonts, xobjects) on an XForm’s stream dict.

Interfaces

Interface	Description
`IDocumentFontUtilities`	Per-document font helper contract — implemented by FontUtilities.
`IOperatorSelector`	Visitor interface for Accept(IOperatorSelector).
`IWarningCallback`	Interface with 1 method.

Enumerations

Enumeration	Description
`AFRelationship`	Relationship between an embedded file and the document content that references it (/AFRelationship, PDF 2.0 §7.11.3).
`FileEncoding`	Compression / encoding used for the embedded file stream’s data (consumed by Encoding).
`Fixup`	Pre-defined PDF fixup operations accepted by Stream, bool, object[]).
`ImageDeleteAction`	Action taken by Delete(int, ImageDeleteAction) when the image being removed is still referenced from the page content.
`ImageFileType`	Recognised image-source file types reported by Image.FileType.
`ImageFilterType`	ImageFilterType enum defines the compression filters Jpeg2000, Flate, Jpeg, and CCITTFax that can be applied when re‑encoding images.
`LaunchActionOperation`	LaunchActionOperation enum defines the possible launch operations: None, Open, and Print.
`NoCharacterAction-Pdf`	Action taken when the configured font does not have a glyph for a character in the stamp text.
`PasswordType`	Identifies which password (if any) is in effect on an encrypted PDF.
`PdfAStandardVersion`	PdfAStandardVersion enum lists supported PDF/A conformance levels, including PDF_A_1A, PDF_A_2B, PDF_A_3U, and PDF_A_4.
`Permissions`	Permissions.PrintDocument, ModifyContent, ExtractContent, etc., are enum values that can be combined to set document security settings.
`PrintScaling`	Enum with 2 members.
`ReturnAction`	The ReturnAction enum is used by RichMediaAnnotation.Accept(visitor) to indicate whether the visitor should Continue processing or Abort.
`Rotation`	Enum with 5 members.
`TabOrder`	Tab order applied to widget annotations on a page (PDF 32000 /Tabs entry).
`WarningType`	Categories of warnings emitted during save/load.

Actions

Class	Description
`ActionCollection`	Collection of actions associated with an annotation.
`GoToAction`	Class with 13 methods and 5 properties.
`GoToRemoteAction`	Go-to-remote action — jumps to a destination in a different PDF file .
`GoToURIAction`	Alias for UriAction, matching the public API name.
`ImportDataAction`	An import-data action (/S /ImportData): imports field data from the FDF/XFDF file identified by the action’s /F file specification.
`JavascriptAction`	Class with 8 methods and 3 properties.
`LaunchAction`	Class with 9 methods and 4 properties.
`NamedAction`	NamedAction.CreateUri(uri) builds a URI action that can be linked to from annotations or form fields.
`PdfAction`	Base class for PDF actions.
`SubmitFormAction`	Submit-form action — sends form field data to a URL or remote file (PDF 32000-1:2008 §12.7.5.2).
`UriAction`	Class with 7 methods and 3 properties.

Enumerations

Enumeration	Description
`ActionType`	The type of a PDF action.

Annotations

Class	Description
`Annotation`	Represents a PDF annotation.
`AnnotationActionCollection`	Per-event PDF action slots for a widget annotation (matches the Aspose.Pdf /AA-tree entry shape: 14 named events plus the direct /A activation action).
`AnnotationCollection`	Collection of annotations on a page.
`AnnotationSelector`	Visitor that filters annotations across one or more pages.
`AppearanceDictionary`	Appearance-stream dictionary on an annotation (/AP entry): maps appearance-state name -> XForm.
`BleedMarkAnnotation`	BleedMarkAnnotation can be instantiated with a page and position, and provides methods to update its appearance, flatten it, and write XFDF data.
`Border`	Represents the border of an annotation or field widget.
`CaretAnnotation`	Class with 16 methods and 52 properties.
`Characteristics`	Annotation characteristics (border, rotation, etc.).
`CircleAnnotation`	Class with 16 methods and 51 properties.
`ColorBarAnnotation`	The ColorBarAnnotation constructor creates a color‑bar annotation on a page by specifying the page, rectangle and a CMYK color selector.
`CommonFigureAnnotation`	Common base for square and circle annotations — a figure drawn inside a rectangle, optionally inset by /RD (PDF 32000 §12.5.6.8).
`Dash`	Represents a dash pattern for borders.
`DefaultAppearance`	Represents the default appearance of a free text annotation.
`DocumentActionCollection`	Document-level /AA additional-action dictionary (PDF 32000-1 §12.6.3 Table 195).
`ExplicitDestination`	Represents an explicit destination in a PDF document (e.g.
`FieldDateTimeFormatter`	Formats a date/time value string according to an Acrobat-style date format.
`FieldNumberCurrencyFormatter`	Formats a numeric string as a currency value.
`FieldNumberPercentFormatter`	Formats a numeric string as a percentage (multiplies by 100 first).
`FileAttachmentAnnotation`	Represents a file attachment annotation.
`FitBExplicitDestination`	Fit-bounding-box destination (/FitB).
`FitBHExplicitDestination`	FitBH destination (/FitBH) — fit bounding box horizontally at Top.
`FitBVExplicitDestination`	FitBV destination (/FitBV) — fit bounding box vertically at Left.
`FitExplicitDestination`	Fit-the-page destination (/Fit).
`FitHExplicitDestination`	Fit horizontally at /Top (/FitH).
`FitRExplicitDestination`	FitR rectangle destination (/FitR).
`FitVExplicitDestination`	Fit vertically at /Left (/FitV).
`FixedPrint`	Class with 3 properties.
`FreeTextAnnotation`	FreeTextAnnotation constructors allow creating a free‑text annotation on a specific page rectangle with a defined appearance.
`GenericAnnotation`	Fallback annotation class for annotation subtypes that have no dedicated model (e.g.
`HighlightAnnotation`	Highlight text markup annotation.
`InkAnnotation`	Class with 17 methods and 52 properties.
`LineAnnotation`	Class with 17 methods and 62 properties.
`LinkAnnotation`	Class with 9 methods and 51 properties.
`MarkupAnnotation`	Class with 15 methods and 50 properties.
`Measure`	Measure-units metadata attached to a LineAnnotation (PDF 32000 §12.5.6.13 measure dictionaries).
`MediaClip`	A media clip object (PDF §13.2.4) — the actual media data or section thereof.
`MediaClipData`	A media clip data object (PDF §13.2.4.2) — full media data via a file specification.
`MediaClipSection`	A media clip section object (PDF §13.2.4.3) — a temporal section of another clip.
`MediaRendition`	A media rendition (PDF §13.2.3.2) — pairs a media clip with playback parameters.
`MovieAnnotation`	Class with 9 methods and 51 properties.
`NumberFormat`	One number-format entry — describes how a measurement value is rendered (precision, separators, before/after text).
`NumberFormatList`	Nested number-format list (Aspose.Pdf shape: Measure+NumberFormatList).
`PDF3DAnnotation`	Class with 14 methods and 53 properties.
`PDF3DArtwork`	A 3D artwork dictionary referenced by a PDF 3D annotation (Aspose.Pdf shape).
`PDF3DContent`	Embedded-stream content for a 3D artwork (U3D or PRC).
`PDF3DCrossSection`	Single cross-section through a PDF 3D model (Aspose.Pdf shape).
`PDF3DCrossSectionArray`	Ordered collection of PDF3DCrossSection entries applied to a PDF 3D view (Aspose.Pdf shape).
`PDF3DCuttingPlaneOrientation`	Orientation angles for the cutting plane of a 3D cross-section (Aspose.Pdf shape).
`PDF3DLightingScheme`	Lighting scheme applied to a PDF 3D artwork (Aspose.Pdf shape).
`PDF3DRenderMode`	Render mode applied to a 3D artwork view (Aspose.Pdf shape).
`PDF3DStream`	PDF /3DD stream wrapper — pairs a PDF3DArtwork with its document-owned content stream.
`PDF3DView`	Camera + render-state snapshot of a 3D artwork (Aspose.Pdf shape).
`PDF3DViewArray`	Indexed collection of PDF3DView snapshots (Aspose.Pdf shape).
`PageInformationAnnotation`	Class with 8 methods and 47 properties.
`PdfActionCollection`	Collection of PdfAction entries attached to an annotation (or any other action-bearing PDF object).
`PolyAnnotation`	Common base for polygon and polyline annotations — a chain of connected vertices (PDF 32000 §12.5.6.9).
`PolygonAnnotation`	Class with 16 methods and 52 properties.
`PolylineAnnotation`	Class with 15 methods and 52 properties.
`PopupAnnotation`	Class with 9 methods and 49 properties.
`PrinterMarkAnnotation`	Aggregate printer’s-mark generator.
`RedactAnnotation`	Backward-compatible alias for RedactionAnnotation.
`RedactionAnnotation`	Represents a redaction annotation.
`RegistrationMarkAnnotation`	Class with 8 methods and 48 properties.
`Rendition`	A rendition object (PDF §13.2.3) — describes a media object to be played by a rendition action.
`RenditionAction`	A rendition action (PDF §12.6.4.14) — controls the playing of multimedia content.
`RichMediaAnnotation`	Class with 12 methods and 52 properties.
`RichTextToFlatStructureTransformer`	Transforms rich text annotation content (XHTML with arbitrarily nested spans) into a flat structure where every leaf text node becomes a single <span style="."> with the fully-merged CSS from all ancestor elements.
`ScreenAnnotation`	The ScreenAnnotation class lets you add a screen annotation to a page by providing the page, rectangle, and media file, and exposes AnnotationType, Action, and Title properties.
`SelectorRendition`	A selector rendition (PDF §13.2.3.3) — chooses among alternative renditions.
`SoundAnnotation`	Class with 16 methods and 52 properties.
`SoundData`	Class with 5 properties.
`SoundSampleData`	SoundSampleData constructors allow specifying samplingRate alone or together with numberOfSoundChannels, bitsPerChannel, and SoundSampleDataEncodingFormat.
`SquareAnnotation`	The SquareAnnotation.Accept(visitor) method implements the visitor pattern, allowing custom processing of annotation objects.
`SquigglyAnnotation`	Squiggly text markup annotation.
`StampAnnotation`	Class with 16 methods and 53 properties.
`StrikeOutAnnotation`	StrikeOut text markup annotation.
`TextAnnotation`	Class with 16 methods and 54 properties.
`TextMarkupAnnotation`	Base class for the text-markup annotations (Highlight, Underline, StrikeOut, Squiggly) — those whose geometry is a set of QuadPoints over page text.
`TextStyle`	Bundled font / colour / alignment style applied to a free-text annotation’s rich text.
`TrimMarkAnnotation`	Class with 8 methods and 48 properties.
`UnderlineAnnotation`	Underline text markup annotation.
`WatermarkAnnotation`	Represents a watermark annotation that can be added to a PDF page.
`WidgetAnnotation`	Class with 13 methods and 59 properties.
`XYZExplicitDestination`	XYZ explicit destination: display the page at position (left, top) with zoom factor.

Interfaces

Interface	Description
`IAppointment`	Marker interface for any object that can be stored in an outline item’s Destination, a link annotation’s Destination, Document.OpenAction, or a named-destination collection.

Enumerations

Enumeration	Description
`ActivationEvent`	Enum with 3 members.
`AnnotationFlags`	Annotation flags as defined in PDF spec Table 165.
`AnnotationState`	Review or marked-state of a markup annotation, as defined by PDF 32000 §12.5.6.3 (text annotations, /StateModel + /State entries).
`AnnotationStateModel`	Which state model a AnnotationState belongs to.
`AnnotationType`	Annotation subtype as defined in PDF spec Table 169.
`BorderEffect`	Border effect applied to annotations.
`BorderStyle`	Border style for annotations and fields.
`CapStyle`	Cap style used by ink strokes (free-hand drawings).
`CaptionPosition`	Caption-position within a LineAnnotation.
`CaretSymbol`	Caret-symbol style for CaretAnnotation.
`ColorsOfCMYK`	CMYK channel selector used by ColorBarAnnotation.
`ContentType`	Enum with 3 members.
`ExplicitDestinationType`	Explicit destination type, mirroring PDF 32000 §12.3.2.2 names.
`FileIcon`	Named-icon style for FileAttachmentAnnotation (/Name entry).
`FractionStyle`	How fractional values are rendered (decimal / fraction / round / truncate).
`FreeTextIntent`	Intent (sub-purpose) of a free-text annotation.
`HighlightingMode`	Highlighting mode for link annotations.
`Justification`	Justification of a free-text annotation’s content.
`LightingSchemeType`	Lighting-scheme nominal type (PDF 32000-1 §13.6.4).
`LineEnding`	Line annotation ending styles (/LE entry elements).
`LineIntent`	Line annotation intents (/IT entry).
`PDF3DActivation`	How the embedded 3D model becomes active (PDF 32000-1 §13.6.2, AAS entry of the 3D activation dictionary).
`PolyIntent`	Intent of a polygon or polyline annotation (/IT entry).
`PredefinedAction`	Named viewer commands targeted by a NamedAction (PDF 32000 §12.6.4.11).
`PrinterMarkCornerPosition`	Corner a printer-mark annotation sits in (used by bleed-/trim-marks).
`PrinterMarkSidePosition`	Side a printer-mark annotation sits on.
`PrinterMarksKind`	The set of printer’s-mark families AddPrinterMarks generates on a page (PDF 32000 pre-press marks).
`RenderModeType`	Render-mode nominal type (PDF 32000-1 §13.6.5).
`ReplyType`	Reply-relationship between a markup annotation and its InReplyTo target.
`RichTextFontStyles`	Rich-text run styles applied via Color).
`SoundEncoding`	Enum with 4 members.
`SoundIcon`	Enum with 2 members.
`SoundSampleDataEncodingFormat`	SoundSampleDataEncodingFormat enum defines the supported audio encodings: Raw, Signed, muLaw, and ALaw.
`StampIcon`	Named stamp-icon style for StampAnnotation (/Name entry, PDF 32000 §12.5.6.14).
`TextAlignment`	Horizontal text alignment for annotation text boxes.
`TextIcon`	Named-icon style for TextAnnotation (PDF 32000 §12.5.6.4 /Name entries).

Artifacts

Class	Description
`Artifact`	Represents a PDF artifact — a marked content sequence tagged as /Artifact (PDF 32000 §14.8.2.2).
`ArtifactCollection`	Collection of artifacts on a page.
`BackgroundArtifact`	Represents a background artifact (a coloured block or image painted behind page content).
`HeaderArtifact`	Represents a header artifact — a page-level running head tagged Artifact /Subtype /Header (PDF 32000 §14.8.2.2).
`WatermarkArtifact`	Represents a watermark artifact that can be added to a PDF page.

Enumerations

Enumeration	Description
`ArtifactSubtype`	Enumerates artifact subtypes.
`ArtifactType`	Enumerates artifact types as defined by PDF 32000 §14.8.2.2.

Collections

Class	Description
`Collection`	PDF Portfolio collection.
`CollectionField`	One column in a PDF Portfolio’s collection schema (PDF spec §7.11.5 Table 75).
`CollectionSchema`	Schema of a PDF Portfolio collection (PDF spec §7.11.5 Table 74).
`ImageCollection`	Collection of image XObjects on a page.
`ImageXObject`	Represents an image XObject found in a PDF page’s resources.
`PageCollection`	Collection of pages in a PDF document.
`XImage`	Image XObject wrapper that mirrors the Aspose.Pdf XImage public surface.
`XImageCollection`	Collection of image XObjects on a page, with XImage-typed accessors and editing helpers.

Enumerations

Enumeration	Description
`CollectionFieldSubtype`	Predefined collection field subtypes (PDF spec §7.11.5 Table 75).

Color

Class	Description
`Color-Pdf`	Represents a color value used in PDF documents.

Enumerations

Enumeration	Description
`ColorSpace`	Top-level device colour-space selector (Aspose.Pdf public surface).
`ColorType`	Represents the color type of a page.

Comparison

Class	Description
`DiffOperation`	A single edit produced when diffing two texts: an Operation (Equal / Delete / Insert) together with the run of text it applies to.
`DiffUtils`	Text helpers used by the diff engine: common prefix/suffix extraction and re-assembly of the source / destination text from a list of DiffOperations.
`MergingOptimizer`	Semantic clean-up pass: eliminates equalities that are no larger than the edits surrounding them (folding those short common runs back into the adjacent delete/insert), then re-merges the result into canonical form.
`OperationsMerger`	Merges a diff into its canonical minimal form: coalesces adjacent runs of the same operation, and for a mixed delete/insert run factors any common prefix into the preceding equality and any common suffix into the following equality.
`OperationsSlideMerger`	Shifts a single edit that is surrounded on both sides by equalities sideways to eliminate one of those equalities, canonicalising the diff.

Interfaces

Interface	Description
`IDiffOptimizationOperation`	A post-processing pass that normalises a diff — a mutable list of DiffOperations — in place, preserving the source and destination texts while producing a cleaner or more canonical sequence of edits.

Enumerations

Enumeration	Description
`EditOperationsOrder`	When a delete and an insert are emitted for the same position, which one an optimizer places first in the resulting operation sequence.
`Operation`	The kind of edit a DiffOperation represents when diffing two texts: a run that is unchanged, deleted from the source, or inserted in the destination.

Content

Class	Description
`BDC`	BDC — Begin marked content with properties.
`BI`	BI — Begin inline-image object.
`BMC`	BMC — Begin marked-content sequence (no properties).
`BT`	BT — Begin text object.
`BX`	BX — Begin compatibility section.
`BasicSetColorAndPatternOperator`	Common base for SCN/scn (basic color or pattern).
`BasicSetColorOperator`	Common base for the rg/RG/g/G/k/K family.
`BlockTextOperator`	Common base for the BT / ET delimiters.
`Clip`	W — Set clipping path (nonzero winding rule).
`ClosePath`	h — Close subpath.
`ClosePathEOFillStroke`	b* — Close, fill, and stroke path (even-odd rule).
`ClosePathFillStroke`	b — Close, fill, and stroke path (nonzero winding rule).
`ClosePathStroke`	s — Close and stroke path.
`ConcatenateMatrix`	cm — Concatenate matrix to CTM.
`ContentStreamBuilder`	Builds PDF content stream bytes using the operator syntax from PDF32000 §8-9.
`CurveTo`	c — Append cubic Bézier curve with three control points.
`CurveTo1`	v — Append cubic Bézier curve; first control point is current point.
`CurveTo2`	y — Append cubic Bézier curve; second control point coincides with final point.
`DP`	DP — Designate marked-content point with property list.
`Do`	Do — Invoke named XObject.
`EI`	EI — End inline-image object.
`EMC`	EMC — End marked content.
`EOClip`	W* — Set clipping path (even-odd rule).
`EOFill`	f* — Fill path (even-odd rule).
`EOFillStroke`	B* — Fill and stroke path (even-odd rule).
`ET`	ET — End text object.
`EX`	EX — End compatibility section.
`EndPath`	n — End path without filling or stroking.
`ExtGState`	Represents an Extended Graphics State dictionary (PDF32000 §8.4.5).
`ExtractedPath`	Represents a complete path with its painting mode and color.
`Fill`	f — Fill path (nonzero winding rule).
`FillStroke`	B — Fill and stroke path (nonzero winding rule).
`GRestore`	Q — Restore graphics state.
`GS`	gs — Set parameters from named ExtGState resource.
`GSave`	q — Save graphics state.
`GlyphPosition`	One element of a TJ-style glyph-position array: a string with an optional preceding/following position adjustment (in 1/1000 text units).
`GraphicsState`	Tracks the PDF graphics state during content stream parsing (PDF32000 §8.4).
`ID-Operators`	ID — Begin image data (after the inline-image dictionary).
`LineTo`	l — Append straight line segment to (X, Y).
`MP`	MP — Designate marked-content point (no properties).
`MoveTextPosition`	Td — Move text position: translate text origin by (X, Y).
`MoveTextPositionSetLeading`	TD — Move text position and set leading: translate by (X, Y) and set leading to -Y.
`MoveTo`	m — Begin new subpath at (X, Y).
`MoveToNextLine`	T* — Move to next line using current leading.
`MoveToNextLineShowText`	’ — Move to next line and show text.
`ObsoleteFill`	F — Fill path (deprecated; equivalent to f).
`Operator-Operators`	Back-compat alias for Operator kept so existing using Aspose.Pdf.Operators; code and the concrete operator subclasses (GSave, BT, ET, …) in this namespace continue to bind.
`OperatorSelector`	Visitor that filters content-stream operators by concrete type.
`PathExtractor`	Extracts vector paths from PDF page content streams.
`PathSegment`	Represents a segment of a path.
`Re`	re — Append rectangle (X, Y, Width, Height) as a complete subpath.
`SelectFont`	Tf — Select font and size.
`SetAdvancedColor`	scn — Set color (with optional pattern name) in current color space (non-stroking).
`SetAdvancedColorStroke`	SCN — Set color (with optional pattern name) in current color space (stroking).
`SetCMYKColor`	k — Set CMYK fill color.
`SetCMYKColorStroke`	K — Set CMYK stroke color.
`SetCharWidth`	d0 — Set glyph width in a Type 3 font.
`SetCharWidthBoundingBox`	d1 — Set glyph width and bounding box in a Type 3 font.
`SetCharacterSpacing`	Tc — Set character spacing.
`SetColor`	sc — Set color in current color space (non-stroking).
`SetColorOperator`	Common base for the SC/SCN/sc/scn family.
`SetColorRenderingIntent`	ri — Set color rendering intent.
`SetColorSpace`	cs — Set color space for non-stroking operations.
`SetColorSpaceStroke`	CS — Set color space for stroking operations.
`SetColorStroke`	SC — Set color in current color space (stroking).
`SetDash`	d — Set dash pattern.
`SetFlat`	i — Set flatness tolerance.
`SetGlyphsPositionShowText`	TJ — Show text with individual glyph positioning (array of strings and numeric adjustments).
`SetGray`	g — Set gray fill color.
`SetGrayStroke`	G — Set gray stroke color.
`SetHorizontalTextScaling`	Tz — Set horizontal text scaling.
`SetLineCap`	J — Set line cap style.
`SetLineJoin`	j — Set line join style.
`SetLineWidth`	w — Set line width.
`SetMiterLimit`	M — Set miter limit.
`SetRGBColor`	rg — Set RGB fill color.
`SetRGBColorStroke`	RG — Set RGB stroke color.
`SetSpacingMoveToNextLineShowText`	" — Set word/char spacing, move to next line, and show text.
`SetTextLeading`	TL — Set text leading.
`SetTextMatrix`	Tm — Set text matrix.
`SetTextRenderingMode`	Tr — Set text rendering mode.
`SetTextRise`	Ts — Set text rise.
`SetWordSpacing`	Tw — Set word spacing.
`ShFill`	sh — Paint shading specified by named resource.
`ShowText`	Tj — Show text string.
`Stroke`	S — Stroke path.
`TextOperator`	Common base for all text-related operators (BT/ET, Tx state, text-show, text-place).
`TextPlaceOperator`	Common base for text-positioning operators (Td, TD, T*, Tm).
`TextShowOperator`	Common base for text-showing operators (Tj, TJ, ‘, “).
`TextStateOperator`	Common base for text-state operators (Tc, Tw, Tz, TL, Tf, Tr, Ts).

Structs

Struct	Description
`PathCommand`	A single path construction command with coordinates.

Enumerations

Enumeration	Description
`LineCap`	Line cap style.
`LineJoin`	Line join style.
`PathOp`	Path construction operator type.
`PathOperationType`	Represents a type of path operation.
`PathPaintMode`	Represents a single path painting operation.

Converters

Class	Description
`MarkdownConverterOptions`	Options for PDF-to-Markdown conversion.
`MdLoadOptions`	Options for loading Markdown files as PDF documents.
`PageSizeInfo`	Page size configuration for document loading.
`PdfToHtmlConverter`	Converts PDF pages to HTML markup.
`PdfToMarkdownConverter`	Converts PDF pages to Markdown text.
`PdfToSvgConverter`	Converts PDF pages to SVG format.
`PdfToTextConverter`	Converts PDF pages to plain text.
`SvgLoadOptions`	Options for loading SVG files as PDF documents.
`TxtLoadOptions`	Options for loading a plain-text (.txt) file as a PDF document.

Enumerations

Enumeration	Description
`ConversionEngines`	Available conversion engines.

Devices

Class	Description
`BmpDevice`	Renders PDF document pages into BMP image format.
`DocumentDevice`	Abstract base for whole-document rendering devices.
`GdiPlusPageRenderer`	PDF page renderer that rasterizes through GDI+ (Graphics).
`GifDevice`	Renders PDF document pages into GIF image format.
`ImageDevice`	Abstract base class for image rendering devices (PNG, JPEG, BMP, TIFF).
`ImagePageDevice`	Default PageDevice that delegates to any ImageDevice — PngDevice / JpegDevice / BmpDevice / TiffDevice.
`IndexBitmapConverter`	Abstract base class for converting rendered images to indexed (1/4/8bpp) bitmaps.
`JpegDevice`	Renders PDF document pages into JPEG image format.
`Margins`	Page margins in points for TIFF rendering.
`PageDevice`	Abstract base for single-page rendering devices.
`PageSize-Devices`	Represents a physical page size in points.
`PdfDocumentDevice`	Default DocumentDevice implementation that saves the document as a PDF (Document.Save round-trip).
`PngDevice`	Renders PDF document pages into PNG image format.
`RgbaBuffer`	Raw RGBA pixel buffer returned by a IPageRenderer.
`SoftwarePageRenderer`	Built-in software PDF page renderer.
`SvgDevice`	Converts a PDF page to SVG markup.
`TextDevice`	Extracts text from PDF pages.
`TiffDevice`	Renders PDF document pages into TIFF image format.
`TiffSettings`	Settings for TIFF image generation (color depth, compression).

Interfaces

Interface	Description
`IPageRenderer`	Renders a PDF page to an RGBA pixel buffer.

Enumerations

Enumeration	Description
`ColorDepth`	Color depth options for TIFF encoding.
`CompressionType`	TIFF compression algorithm options.
`FormPresentationMode`	How form fields are rendered (canonical Production / Editor split).
`PageCoordinateType`	Which page-box the rendered image extents come from.
`ShapeType`	Shape type for TIFF rendering.

Drawing

Class	Description
`Arc`	An arc shape (portion of an ellipse).
`Circle`	A circle shape.
`Color-Drawing`	Color for drawing shapes.
`Curve`	A Bézier curve shape.
`DrawingPath`	A path shape composed of move, line, and curve segments.
`DrawingRectangle`	A rectangle shape.
`Ellipse`	An ellipse shape.
`GradientAxialShading`	Defines a linear (axial) gradient between two colors for use as a fill pattern.
`Graph`	A graph container that holds drawable shapes and renders them to a content stream.
`Line`	A line shape.
`PatternColorSpace`	Pattern colour-space marker (Aspose.Pdf public surface).
`Point-Drawing`	A 2D point (x, y).
`Polygon`	A polygon shape (closed path with arbitrary vertices).
`Rectangle-Drawing`	A rectangle shape in the Drawing namespace (distinct from Aspose.Pdf.Rectangle which is a page rectangle).
`Shape`	Base class for drawable shapes.

Enumerations

Enumeration	Description
`ImageFormat`	Specifies the encoding format of an image.

Enums

Class	Description
`Id`	Pair of byte strings that make up the /ID array in the PDF trailer.

Enumerations

Enumeration	Description
`Direction`	Predominant text-flow direction recorded in the viewer-preferences dictionary.
`ExtendedBoolean`	A tri-state Boolean — True/False plus an Undefined sentinel used at deserialization time when a value isn’t carried on the PDF dictionary entry.
`FieldValueType`	Logical value type carried by a CollectionField.
`HorizontalAlignment`	Describes horizontal alignment.
`PageLayout`	Page-layout entry written to the catalog (PDF32000 Table 28).
`PageMode`	Page-mode entry written to the catalog (PDF32000 Table 28).
`PdfVersion`	PDF specification version targeted by the document header.
`PrintDuplex`	Print-duplex value recorded in viewer preferences (PDF32000 Table 150).
`VerticalAlignment`	Describes vertical alignment.

Exceptions

Class	Description
`CrashReportOptions`	Configures crash-report emission for GenerateCrashReport.
`FontNotFoundException`	Thrown when a requested font cannot be located (no system font with that name, no matching custom-font source, etc.).
`IncorrectFontUsageException`	Thrown during text extraction when the content stream issues a text-showing operator (Tj/TJ/’/”) while no font is set in the current graphics state — i.e.
`InvalidFormTypeOperationException`	Thrown when an operation is attempted on the wrong form type (e.g.
`InvalidPasswordException`	Thrown when a password-protected operation is attempted without supplying a valid password (e.g.
`InvalidPdfFileFormatException`	Thrown when a stream cannot be opened as a PDF (bad header, truncated file, or otherwise unrecognisable as PDF).
`PdfException`	Represents errors that occur during PDF application execution.
`PdfExceptionMessages`	Centralised message strings surfaced by the library’s exceptions and security diagnostics.
`PdfTextDecodingException`	Thrown when text content cannot be decoded — e.g.
`UnsupportedFontTypeException`	Thrown when a file cannot be opened as a font because its format is not a supported font program (e.g.
`ValidationIssue`	Represents a validation issue found in a PDF document.

Facades

Class	Description
`AlignmentType`	Horizontal-alignment selector for legacy facade APIs (e.g.
`AutoFiller`	Repeatedly stamps a template PDF with rows from a DataTable: for each row, fills the form fields whose names match column names, flattens (except those listed in UnFlattenFields), and appends the resulting pages to the output.
`BDCProperties`	Properties for a BDC / DP marked-content operator (/MCID and /Lang).
`Bookmark`	A single bookmark extracted from a document’s outline tree by ExtractBookmarks().
`Bookmarks`	An ordered, indexable collection of Bookmark entries returned by ExtractBookmarks().
`ContentsResizeParameters`	Parameters for ResizeContents describing margins, content size, and whether the page media box should change to match.
`ContentsResizeValue`	Represents a content-resize value.
`CorruptedItem`	One file the Concatenate path could not parse — recorded only when CorruptedFileAction is set to skip-and-continue.
`DocumentPrivilege`	Represents document access permissions (P value in encryption dictionary).
`FontColor`	Represents a font color using RGB components.
`Form-Facades`	Facade for form field manipulation including XML import/export.
`FormDataConverter`	Bridges PDF form-data formats (FDF / XFDF / XML) with DataTable and direct stream-to-stream transforms.
`FormEditor`	Facade for form operations: fill fields, flatten forms, import/export data.
`FormFieldFacade`	Represents the visual appearance attributes of a form field.
`FormImportResult`	Per-field result of a form-data import operation.
`FormattedText`	Represents formatted text used in stamp and mend operations.
`FormattedTextFont`	Represents a font reference returned by FormattedText.getFont().
`LineInfo`	Line drawing parameters for PdfContentEditor.DrawCurve.
`PageBreak`	Describes a single horizontal cut on a source page: PageNumber (1-based) identifies the page in the source document, Position the PDF y-coordinate where the page is split.
`PdfAnnotationEditor`	Facade for annotation manipulation: import/export XFDF, delete, flatten, redact.
`PdfBookmarkEditor`	Facade for bookmark (outline) manipulation: create, extract, delete bookmarks.
`PdfContentEditor`	Facade for content-level editing: text replacement, link creation, image operations.
`PdfConverter`	Facade for converting PDF pages to images.
`PdfExtractor`	Facade for extracting text and images from a PDF document.
`PdfFileEditor`	Real-only additions to PdfFileEditor: exception-handling state, Try* wrappers around the existing working methods, and MemoryStream/file overloads for SplitToBulks/SplitToPages that wrap the real byte[] implementations already present in PdfFileEditor.cs.
`PdfFileInfo`	Facade for accessing PDF document metadata and properties.
`PdfFileMend`	Facade for adding text and images to existing PDF documents.
`PdfFileSecurity`	Facade for encrypting, decrypting, and changing passwords on PDF files.
`PdfFileSignature`	Facade for signing and reading digital signatures in PDF documents.
`PdfFileStamp`	Facade for adding stamps, page numbers, headers, footers, and watermarks.
`PdfJavaScriptStripper`	Removes all JavaScript from a PDF document.
`PdfPageEditor`	Facade for page-level editing: rotation, resizing, margin adjustment, and page box manipulation (CropBox, TrimBox, BleedBox, ArtBox).
`PdfPrintPageInfo`	Class with 1 property.
`PdfViewer`	Façade for viewing / printing a PDF document.
`PdfXmpMetadata`	Dictionary-style facade over a PDF document’s XMP metadata stream.
`RenderingOptions-Facades`	Rendering options used by PdfConverter and other facade classes.
`ReplaceTextStrategy`	Configures how ReplaceText(string, string) matches and substitutes text.
`SignatureName`	Identifies a signature field by both its partial name (Name) and full hierarchical name (FullName), and reports whether the field currently carries a signature value via HasSignature.
`Stamp-Facades`	Represents a stamp to be applied via PdfFileStamp facade.
`StampInfo`	Contains information about a stamp on a page.
`TextProperties`	Text-display properties consumed by the *TextOperator family.
`VerticalAlignmentType`	Vertical-alignment selector for legacy facade APIs (e.g.
`ViewerPreference`	Bag of const int bit-flags describing viewer preferences (page mode, page layout, fullscreen behaviour, duplex, print scaling, reading direction).

Interfaces

Interface	Description
`IFacade`	Interface with 5 methods.
`ISaveableFacade`	Interface with 5 methods.

Enumerations

Enumeration	Description
`Algorithm`	Encryption algorithm family used by PdfFileSecurity.
`AutoRotateMode`	Auto-rotation behaviour for the PDF viewer.
`BlendingColorSpace`	Blend-mode colour-space hint passed to a Stamp.
`ConcatenateCorruptedFileAction`	How the facade reacts to corrupted input during Concatenate.
`DataType`	Form-data source / destination kind consumed by FormDataConverter.
`DefaultMetadataProperties`	Well-known XMP-basic-schema property keys exposed by PdfXmpMetadata as a typed alternative to raw “xmp:<name>” strings.
`EncodingType`	Encoding type enumeration for FormattedText.
`ExtractImageMode`	Image extraction mode — matches docs.aspose.com Aspose.Pdf.ExtractImageMode.
`ExtractTextMode`	Text extraction mode — matches docs.aspose.com “Pure” (0) / “Raw” (1).
`FieldType-Facades`	The type of an AcroForm field, as used by AddField and related facade operations.
`FontStyle`	Font style enumeration for FormattedText.
`ImageMergeMode`	Layout strategy used by MergeImages when combining multiple input images into a single output image.
`ImportStatus`	Outcome of importing a single field’s value.
`KeySize`	Key strength selector paired with Algorithm to pick the concrete RC4/AES variant used by PdfFileSecurity.
`NoCharacterAction-Facades`	What to do when the replacement font lacks a glyph for a character.
`PdfConverterImageFormat`	Image format for PdfConverter output.
`PositioningMode`	Text positioning mode for PdfFileMend.
`PropertyFlag`	Attribute flags applied to a form field via SetFieldAttribute.
`Scope-Facades`	How many matches to replace per call.
`StampType`	Stamp kind exposed by StampInfo.
`SubmitFormFlag`	Format of the data posted by a Submit form action — set per field via SetSubmitFlag.
`WordWrapMode-Facades`	Word wrap mode for PdfFileMend text operations.

Forms

Class	Description
`AcroFormData`	Form-level AcroForm dictionary data surfaced by the form JSON export.
`AppearanceEntry`	One state of a widget appearance variant (the body of an /AP/N, AP/D, or /AP/R entry).
`ButtonField`	Push-button form field (FT=Btn with Pushbutton flag set).
`CheckboxField`	Class with 26 methods and 84 properties.
`ChoiceField`	Class with 25 methods and 89 properties.
`ComboBoxField`	Combo box (drop-down) form field — a ChoiceField with the Combo flag set.
`DefaultResourcesData`	Form-level default resources (/DR) surfaced by the form JSON export.
`DocMDPSignature`	Pairs a Signature (which carries the signing certificate) with the DocMDPAccessPermissions level a certifying signature will impose.
`ExportFieldsToJsonOptions`	Options passed to ExportToJson.
`Field`	Represents a form field.
`FieldExportingData`	Data-transfer object describing a single form field (or the form-level AcroForm dictionary) as produced by the form JSON export.
`FieldSerializationResult`	Per-field outcome of an ExportToJson or ImportFromJson call.
`FlattenSettings`	Settings for Flatten(FlattenSettings).
`Form-Forms`	Represents the interactive form (AcroForm) of a PDF document.
`FormFieldBuilder`	Creates new interactive form fields and adds them to a PDF document.
`IconFit`	PDF Annotation Handler “IF” entry — icon-fit dictionary for push-button widgets.
`ListBoxField`	List box form field — a ChoiceField without the Combo flag.
`Option`	Class represents option of choice field.
`OptionCollection`	Mutable collection of Option values backed by the owning ChoiceField’s /Opt entry.
`PKCS1`	Class with 7 methods and 14 properties.
`PKCS7`	Class with 6 methods and 14 properties.
`PKCS7Detached`	A detached PKCS#7 (CMS) signature configuration.
`RadioButtonField`	Class with 27 methods and 95 properties.
`RadioButtonGroup`	A logical radio-button group — a set of mutually exclusive options sharing the same field name in the AcroForm hierarchy.
`RadioButtonOption`	A single option within a radio button group.
`RadioButtonOptionField`	One option of a RadioButtonField.
`RichTextBoxField`	A Tx form field that carries the rich-text flag (bit 26 of /Ff).
`Signature`	Represents a digital signature in a PDF document.
`SignatureCustomAppearance`	Visual-layout knobs for a signature’s appearance stream — font, size, padding and which signer metadata strings are rendered inside the widget annotation.
`SignatureField`	SignatureField.Sign(signature) applies a digital signature to a form field, and Flatten() can make the signature appearance permanent in the document.
`TextBoxField`	The TextBoxField class lets developers create AcroForm text fields with multiple constructors and supports adding barcodes and images to the field.
`XFA`	XmlNode-based accessor for the document’s XFA packets (template / datasets / config / form / xdp).
`XfaAccessor`	Provides indexer access to XFA field values by path.
`XfaField`	Represents a single field of an XFA form addressed by its template SOM path (e.g.

Enumerations

Enumeration	Description
`BoxShape`	Outer shape of a checkbox / radio-button widget border.
`BoxStyle`	Visual style of the checkbox glyph (/MK /CA mapping).
`DocMDPAccessPermissions`	/DocMDP /TransformParams /P access-permission levels per PDF 32000-1 §12.8.2.2.
`FieldSerializationStatus`	Outcome of serializing a single form field through ExportToJson or ImportFromJson.
`FieldType-Forms`	The type of a form field.
`FormType`	Represents the type of a PDF form.
`IconCaptionPosition`	PDF Annotation Handler “TP” entry — caption / icon layout for push-button widgets.
`ScalingMode`	How a button icon is scaled to fit its rectangle (/MK /IF /SW).
`ScalingReason`	When to scale the icon to fit its rectangle (/MK /IF /S).
`SignDependentElementsRenderingModes`	How widgets dependent on signature appearance are rendered when the form is converted.
`SubjectNameElements`	X.500 distinguished-name components rendered inside the visible signature appearance when UseDigitalSubjectFormat is set.

Functions

Class	Description
`ExponentialFunction`	Exponential interpolation function (§7.10.3).
`PdfFunction`	Abstract base for all PDF function types.
`PostScriptEvaluator`	PostScript calculator evaluator for Type 4 PDF functions (PDF32000 §7.10.5).
`PostScriptFunction`	PostScript calculator function (§7.10.5).
`SampledFunction`	Sampled function (§7.10.2): lookup table with linear interpolation.
`StitchingFunction`	Stitching function (§7.10.4): combines sub-functions over sub-domains.

Generator

Class	Description
`BaseParagraph`	Base class for paragraph-level DOM content (text fragments, tables, images, header/footer fragments, floating boxes).
`BorderInfo`	Represents border information for table cells and rows.
`Cell`	Represents a cell in a table row.
`Cells`	A collection of cells in a row.
`ColumnInfo`	ColumnInfo stores table layout details, exposing ColumnWidths, ColumnSpacing, and ColumnCount properties for precise column sizing.
`FileHyperlink`	Hyperlink that launches an external file (e.g.
`FloatingBox`	Represents a floating box that can be positioned absolutely or flowed on a page.
`GraphInfo`	Stroke / fill settings for drawable shapes and table-cell borders.
`HeaderFooter`	Represents a header or footer that can be applied to PDF pages.
`Heading`	Represents a TOC heading entry that links to a destination page.
`Hyperlink`	Base type for hyperlinks attached to text fragments or annotations.
`LevelFormat`	Per-heading-level TOC formatting descriptor (line-dash style, margins, indent, text state).
`LocalHyperlink`	Hyperlink that jumps to another paragraph or page in the same document.
`MarginInfo`	Represents margin information for page elements.
`Note`	A footnote or endnote attached to a TextFragment.
`Paragraphs`	Container for paragraph-level content (text fragments, tables, images, header/footer fragments, etc.) attached to a Page, Cell, HeaderFooter or FloatingBox.
`Row`	Represents a row in a table.
`Rows`	A collection of rows in a table.
`Table`	Represents a table that can be added to a PDF page.
`TocInfo`	Table of contents information for a page.
`WebHyperlink`	Hyperlink that opens an external URL.

Enumerations

Enumeration	Description
`BorderCornerStyle`	Corner-rounding style for a Table’s border box.
`BorderSide`	Specifies which sides of a border to draw.
`ColumnAdjustment`	How a Table sizes its columns (API parity).
`ParagraphPositioningMode`	How Left / Top are interpreted.
`TableBroken`	TableBroken enum indicates how a table is split across pages, with values None, Vertical, VerticalInSamePage, and IsInNextPage.

Geometry

Class	Description
`Matrix`	Represents a 3x3 transformation matrix [a b 0; c d 0; e f 1].
`Matrix3D`	4×3 affine 3D matrix (Aspose.Pdf shape for PDF 3D camera positioning).
`PageSize-Pdf`	Standard page size constants (dimensions in points, portrait orientation).
`Point-Pdf`	Represents a point in 2D space.
`Point3D`	Represents a point in 3D space (used by 3D annotations).
`Rectangle-Pdf`	Represents a rectangle defined by lower-left and upper-right coordinates (PDF user-space convention: Y increases upward).

Groupprocessor

Struct	Description
`ObjectKey`	Identifies a PDF indirect object by its object number and generation number.

Helpers

Class	Description
`BoundsCheckableList`	A list of T that optionally enforces container bounds on insertion.
`OptimizedMemoryStream`	A growable in-memory stream that can exceed the 2 GB single-array limit of MemoryStream by storing data in fixed-size chunks.
`PolygonsHelper`	Polygon and rectangle geometry utilities — point/polygon containment, segment hit-testing and rectangle/polygon classification.

Enumerations

Enumeration	Description
`BoundsCheckMode`	How a BoundsCheckableList{T} reacts when an item lies outside its container.
`RectanglePosition`	Position of a rectangle relative to a polygon, as returned by GetRectanglePositionRelativePolygon.

Html

Class	Description
`CssSavingInfo`	Context passed to a CssSavingStrategy callback.
`CssUrlRequestInfo`	Context passed to a CssUrlMakingStrategy callback.
`HtmlFragment`	Represents an HTML content fragment that can be added to PDF pages via HeaderFooter.Paragraphs or Page.Paragraphs.
`HtmlImageSavingInfo`	Context passed to a per-image saving callback.
`HtmlLoadOptions`	Options for loading HTML content into PDF.
`HtmlPageMarkupSavingInfo`	Context passed to a HtmlPageMarkupSavingStrategy callback.
`HtmlSaveOptions`	Options for saving a PDF document as HTML.

Enumerations

Enumeration	Description
`AntialiasingProcessingType`	Antialiasing pass applied to the resulting HTML.
`FontEncodingRules`	Backing-byte enum: the Aspose.Pdf reflection signature is byte-typed.
`FontSavingModes`	How fonts are emitted into the output HTML.
`HtmlDocumentType`	HTML document flavour produced by HtmlSaveOptions.
`HtmlImageType`	Image type produced for embedded raster content.
`HtmlMarkupGenerationModes`	Granularity of HTML markup produced.
`HtmlMediaType`	Specifies the media type for HTML rendering.
`HtmlPageLayoutOption`	How the generated PDF page layout reacts to wide HTML content.
`ImageParentTypes`	Container element that hosts an image.
`LettersPositioningMethods`	How letter positions are encoded in the output CSS.
`PartsEmbeddingModes`	Whether and how secondary parts (CSS / images / fonts) are embedded.
`RasterImagesSavingModes`	How raster images are saved alongside the HTML.

Interop

Class	Description
`BitmapInfo`	Class with 2 methods and 4 properties.

Interfaces

Interface	Description
`IIndexBitmapConverter`	Interface with 3 methods.

Enumerations

Enumeration	Description
`PixelFormat`	Enum with 6 members.

Io

Class	Description
`ZDeflaterOutputStream`	zlib (RFC 1950) deflating output stream — a public helper matching the Aspose.Pdf surface.
`ZInflaterInputStream`	zlib (RFC 1950) inflating input stream — a public helper matching the Aspose.Pdf surface.

Logicalstructure

Class	Description
`AnnotElement`	Class with 11 methods and 13 properties.
`ArtElement`	Class with 11 methods and 13 properties.
`AttributeName`	A typed value for a standard attribute name (the /Name-valued entries in an attribute object, e.g.
`BibEntryElement`	Class with 11 methods and 13 properties.
`BlockQuoteElement`	Class with 11 methods and 13 properties.
`CaptionElement`	Class with 11 methods and 13 properties.
`CodeElement`	Class with 11 methods and 13 properties.
`DivElement`	Class with 11 methods and 13 properties.
`DocumentElement`	The document root structure element (/S Document).
`Element-LogicalStructure`	Common base for nodes in the logical-structure tree.
`ElementList`	An ordered list of structure elements, as returned by ChildElements.
`FigureElement-LogicalStructure`	FigureElement also offers AdjustPosition(settings) to reposition the figure according to layout settings.
`FormElement`	Class with 11 methods and 13 properties.
`FormulaElement`	Class with 12 methods and 17 properties.
`HeaderElement`	Class with 11 methods and 13 properties.
`IllustrationElement`	Abstract base for illustration-kind structure elements (Figure, Formula).
`IndexElement`	Class with 11 methods and 13 properties.
`LinkElement`	Class with 11 methods and 15 properties.
`ListElement`	Class with 11 methods and 13 properties.
`ListLBodyElement`	Class with 11 methods and 13 properties.
`ListLIElement`	Class with 11 methods and 13 properties.
`ListLblElement`	Class with 11 methods and 13 properties.
`MCRElement`	A marked-content reference leaf (role “MCR”) emitted by the auto-tagger to mark where a structure element’s page content lives.
`NonStructElement`	NonStructElement.SetTag(tag) assigns a custom tag to a non‑structural element, influencing its identification in the PDF structure tree.
`NoteElement`	Class with 11 methods and 13 properties.
`OBJRElement`	An object reference (role “OBJR”) — links a structure element to a PDF object on a page (typically an annotation, e.g.
`ParagraphElement`	ParagraphElement provides methods to modify its text, tag, ID, and hierarchical position within a PDF structure.
`PartElement`	Class with 11 methods and 13 properties.
`PrivateElement`	Class with 11 methods and 13 properties.
`QuoteElement`	Class with 11 methods and 13 properties.
`ReferenceElement`	Class with 11 methods and 13 properties.
`RubyElement`	Class with 11 methods and 13 properties.
`SectElement`	SectElement provides methods such as AppendChild, SetTag, SetText, and Remove to build and manipulate structural elements within a PDF document.
`SpanElement`	SpanElement methods such as AppendChild, SetTag, SetText, SetId, AdjustPosition, and ChangeParentElement let developers build and manipulate structured PDF content.
`StructTreeRootElement`	The /StructTreeRoot wrapper at the top of the logical- structure tree.
`StructureAttribute`	A single tagged-PDF structure attribute (key plus one typed value).
`StructureAttributes`	An owner-scoped set of StructureAttribute objects attached to a structure element (one PDF attribute dictionary with a fixed /O owner).
`StructureElement`	Base class for tagged-PDF logical-structure elements.
`StructureElementAttributes`	The attribute manager exposed by Attributes.
`StructureTextState`	Text-state snapshot used to format inline structure-element runs.
`StructureType`	A structure-type role (the /S entry value), exposed via S.
`TOCElement`	Class with 11 methods and 13 properties.
`TOCIElement`	Class with 11 methods and 13 properties.
`TableElement`	Class with 14 methods and 31 properties.
`TableTBodyElement`	Class with 12 methods and 13 properties.
`TableTDElement`	TableTDElement.ColSpan and RowSpan properties allow a cell to span multiple columns or rows within a Table.
`TableTFootElement`	Class with 12 methods and 13 properties.
`TableTHElement`	Class with 11 methods and 23 properties.
`TableTHeadElement`	Class with 12 methods and 13 properties.
`TableTRElement`	Class with 13 methods and 23 properties.
`WarichuElement`	Class with 11 methods and 13 properties.

Interfaces

Interface	Description
`ITextElement`	A structure element that can carry inline text content (written to the element’s /ActualText entry).

Enumerations

Enumeration	Description
`AttributeKey`	Standard tagged-PDF attribute keys (ISO 32000-1 §14.8.5).
`AttributeOwnerStandard`	Standard owners of a tagged-PDF attribute set (the /O entry of an attribute object, ISO 32000-1 Table 348).

Navigation

Class	Description
`DestinationArray`	Opaque wrapper around a PDF destination array, created by NamedDestination factory methods.
`DestinationCollection`	Named-destination collection exposed as IEnumerable<KeyValuePair<string, object>> for Aspose.Pdf parity.
`NamedDestination`	Represents a named destination in the document (PDF32000 §12.3.2.3).
`NamedDestinationCollection`	Collection of named destinations in the document.
`OutlineBuilder`	Builder for creating bookmarks (outlines) programmatically.
`OutlineCollection`	Class with 11 methods and 8 properties.
`OutlineItem`	Represents a bookmark (outline item) in the document outline hierarchy.
`OutlineItemBuilder`	Builder for a single outline item with fluent API.
`OutlineItemCollection`	The document outline (bookmark tree).
`Outlines`	Document-level bookmark (outline) collection.
`PageLabel`	Represents a page label range.
`PageLabelBuilder`	Builder for creating page labels on a document.
`PageLabelCollection`	Collection of page label ranges from the /PageLabels number tree.

Enumerations

Enumeration	Description
`NumberingStyle`	Numbering style for page labels.

Optimization

Class	Description
`AutoTaggingSettings`	Settings controlling automatic structure-tree generation during conversion.
`FontEmbeddingOptions`	Font-embedding behaviour during conversion.
`HeadingLevels`	Heading-level recognition tuning for AutoTaggingSettings.
`ImageCompressionOptions`	Image-compression sub-options for OptimizationOptions.
`OptimizationOptions-Optimization`	Class which describes document optimization algorithm.
`PdfANonSpecificationFlags`	PDF/A non-spec compliance toggles.
`PdfASymbolicFontEncodingStrategy`	Strategy for re-encoding symbolic fonts during PDF/A conversion.
`PdfFormatConversionOptions`	Options for converting a PDF document to a specific PDF/A conformance level.
`QueueItem`	One entry in the priority queue — names a single (platformID, platformSpecificID) cmap subtable.
`RgbToDeviceGrayConversionStrategy`	Converts all RGB color operators and image color spaces on a page to DeviceGray.
`ToUnicodeProcessingRules`	Rules applied when generating ToUnicode CMaps during conversion.

Enumerations

Enumeration	Description
`CMapEncodingTableType`	OpenType cmap subtable selector.
`ConvertErrorAction`	Action to take when a conversion error is found.
`ConvertSoftMaskAction`	Soft-mask handling strategy during PDF/A conversion.
`ConvertTransparencyAction`	Action to take when transparency is encountered during PDF/A conversion.
`HeadingRecognitionStrategy`	Algorithm used to detect headings during auto-tagging.
`ImageCompressionVersion`	Strategy version for image compression.
`ImageEncoding`	How image streams are re-encoded during optimization.
`PdfFormat`	PDF format/conformance level for validation and conversion.
`PuaProcessingStrategy`	Strategy for processing Private-Use-Area Unicode characters.
`RemoveFontsStrategy`	Strategy for removing or excluding fonts during conversion.
`SegmentAlignStrategy`	Strategy for collapsing adjacent text segments during PDF/A conversion.

Options

Class	Description
`BorderPartStyle`	Class with 1 method and 1 property.
`CompositingParameters`	Image-blending parameters consumed by Stream, int, float, float, float, float, CompositingParameters).
`LayerCollection`	Represents the collection of layers on a specific page.
`LayerEntry`	Represents a layer being built by OptionalContentBuilder.
`LoadOptions`	Class with 4 properties.
`MarginPartStyle`	One side of a MarginInfo: either a fixed PDF-point value or an auto-fit hint.
`OptionalContentBuilder`	Creates optional content groups (layers) in a PDF document.
`OptionalContentGroup`	Represents an Optional Content Group (layer) in a PDF document.
`OptionalContentProperties`	Collection of Optional Content Groups (layers) in a document.
`OutputIntent`	Represents a PDF OutputIntent entry (PDF32000 §14.11.5).
`OutputIntents`	Collection of OutputIntent entries on the document catalog’s /OutputIntents array.
`PdfSaveOptions`	Class with 8 properties.
`ProgressEventHandlerInfo`	Class in the Pdf NET API.
`RenderingOptions-Pdf`	Rendering options used by the page-to-image converters (PngDevice, JpegDevice, PdfConverter, …).
`ResourceLoadingResult`	Class with 1 method and 1 property.
`ResourceSavingInfo`	Class with 1 property.
`SaveOptions`	The SaveOptions class exposes properties such as SaveFormat, CloseResponse, and WarningHandler to control PDF saving behavior.
`SvgImageSavingInfo`	Class with 2 properties.
`SvgSaveOptions`	SvgSaveOptions provides properties such as SaveFormat to control how a PDF is saved as SVG.
`UnifiedSaveOptions`	Class with 7 properties.
`ViewerPreferences`	Represents the document’s viewer preferences (PDF32000 §12.2).

Enumerations

Enumeration	Description
`BlendMode`	PDF blend modes (Table 136 of PDF 32000-1:2008).
`DefaultState`	Default visibility state of an Optional Content Group (layer).
`HtmlBorderLineType`	Enum with 9 members.
`LoadFormat`	Source format selector used by LoadOptions.
`NodeLevelResourceType`	NodeLevelResourceType enum distinguishes between Font and Image resources when working with structural elements.
`PageLayoutMode`	Page layout mode for the document (PDF32000 §12.2, Table 28).
`PageModeValue`	Page mode specifying how the document should be displayed on opening (PDF32000 §12.2, Table 28).
`ProgressEventType`	Conversion-progress milestones reported via EventType.
`SaveFormat`	Save format enumeration.
`SvgExternalImageType`	Image format used by the SVG embedded-image saver.

Printing

Class	Description
`CustomPrintEventArgs`	Event args raised by PdfViewer.CustomPrint.
`PageSettings`	Per-page print settings (paper size / orientation / margins).
`PaperSize`	The PaperSize class lets developers define custom page dimensions by specifying a name, width, and height.
`PdfQueryPageSettingsEventArgs`	Event args supplied to PdfViewer.PdfQueryPageSettings.
`PrinterSettings`	Printer-side settings (printer name, copies, range).
`StartEndPageEventArgs`	Event args raised by PdfViewer.StartPage / EndPage.

Security

Class	Description
`BitString`	A variable-length bit string supporting bitwise operations, concatenation, substring extraction, and conversion to/from bytes and hex.
`CertificateEncryptionOptions`	Bundles the public certificate used to encrypt a document and the private-key store needed to decrypt it.
`EncryptionInfo`	Information about a document’s encryption.
`EncryptionParameters`	Parameters parsed from the document’s /Encrypt dictionary and passed to Initialize when a custom security handler takes over for an alternative /Filter.
`HashAlgorithmFactory`	Creates a HashAlgorithm for a DigestHashAlgorithm.
`MathExtensions`	Small integer math helpers shared by the security primitives.
`PdfCertificate`	Represents a certificate + private key for PDF signing.
`PdfSigner`	Signs PDF documents with X.509 certificates using PKCS#7/CMS detached signatures.
`Sha3_256`	SHA3-256 (FIPS 202) — own Keccak implementation.
`Sha3_384`	SHA3-384 (FIPS 202) — own Keccak implementation.
`Sha3_512`	SHA3-512 (FIPS 202) — own Keccak implementation.
`SignatureAlgorithmInfo`	Algorithm + digest + envelope-standard triple extracted from a PDF signature value.
`SignatureAppearance`	Defines the visual appearance for a digital signature annotation.
`SignatureOptions`	Options for signing a PDF document.
`ValidationOptions`	Tunes the verification policy used by Verify(SignatureName, ValidationOptions, out ValidationResult).
`ValidationResult`	Verification outcome produced by Verify(SignatureName, ValidationOptions, out ValidationResult).

Interfaces

Interface	Description
`ICustomSecurityHandler`	Pluggable custom security handler — implement this to handle non-Standard /Filter entries (e.g.

Enumerations

Enumeration	Description
`CryptoAlgorithm`	PDF encryption algorithm.
`CryptographicStandard`	Cryptographic envelope standard reported by a PDF signature SubFilter entry.
`DigestHashAlgorithm`	Digest hash algorithm used by a PDF signature (PKCS#7 messageDigest attribute).
`SignatureAlgorithmType`	Signing-algorithm family extracted from a signature’s PKCS#7 signatureAlgorithm OID.
`ValidationMethod`	Revocation-check protocol selector used by ValidationMethod.
`ValidationMode`	How aggressively VerifySignature(string, ValidationOptions, out ValidationResult) reports problems.
`ValidationStatus`	Outcome categories reported by Status.

Shading

Class	Description
`AxialShading`	Axial (linear) shading (Type 2, §8.7.4.3).
`CoonsPatchShading`	Coons patch mesh (Type 6, §8.7.4.5.7).
`FreeFormGouraudShading`	Free-form Gouraud-shaded triangle mesh (Type 4, §8.7.4.5.5).
`FunctionBasedShading`	Function-based shading (Type 1, §8.7.4.2).
`LatticeFormGouraudShading`	Lattice-form Gouraud-shaded triangle mesh (Type 5, §8.7.4.5.6).
`Pattern`	Abstract base for all PDF pattern types.
`RadialShading`	Radial (circular) shading (Type 3, §8.7.4.4).
`ShadingBase`	Abstract base for all PDF shading types (§8.7.4.1).
`ShadingPattern`	Shading pattern (PatternType 2, §8.7.3.2): smooth gradient.
`TensorPatchShading`	Tensor-product patch mesh (Type 7, §8.7.4.5.8).
`TilingPattern`	Tiling pattern (PatternType 1, §8.7.3.1): repeating tile.

Enumerations

Enumeration	Description
`ShadingType`	Shading type — /ShadingType entry.

Stamps

Class	Description
`PageNumberStamp`	A stamp that adds page numbers to PDF pages.
`PdfPageStamp`	Stamps the content of one PDF page onto another page.
`Stamp-Stamps`	Base class for stamps that can be applied to PDF pages.
`TextStamp-Stamps`	A text stamp that can be applied to PDF pages.
`WatermarkStamp`	A watermark stamp that draws diagonal text across the page.

Structure

Class	Description
`Element-Structure`	A node in a PDF’s logical-structure tree (the /StructTreeRoot /K subtree, plus their /K descendants).
`ElementCollection`	A live, mutable collection of structure elements held under a parent’s /K array.
`FigureElement-Structure`	A figure structure element (/S = “Figure”) that wraps a raster or vector picture.
`RootElement`	Top-level wrapper for the PDF /StructTreeRoot dictionary.
`StructElement`	A generic structure element (anything other than the recognised typed subclasses).
`TextElement`	A text-bearing structure element (Span / P / Quote / Note / Reference / BibEntry).

Tagged

Class	Description
`MarkedContentInfo`	Information about a marked content sequence, used to wrap content in BDC/EMC operators.
`PositionSettings`	Layout/position settings for a tagged structure element, passed to AdjustPosition.
`StructTreeElement`	Read-only view of a single structure element in a tagged document’s structure tree: its role, accessibility text, attributes, marked-content references, and child elements.
`StructTreeRoot`	Read-only view of a tagged document’s structure-tree root (/StructTreeRoot).
`StructureElementBuilder`	Builder for creating a structure element with children and marked content.
`StructureTreeBuilder`	Builds a logical structure tree for a tagged PDF document.
`TaggedContent`	Provides access to tagged PDF metadata (title, language) and the logical structure tree.
`TaggedException`	Exception thrown when a tagged PDF structure operation violates PDF spec constraints.

Interfaces

Interface	Description
`ITaggedContent`	The author-facing surface for a tagged PDF document.

Text

Class	Description
`AbsorbedCell`	Represents a cell in an absorbed table.
`AbsorbedRow`	Represents a row in an absorbed table.
`AbsorbedTable`	Represents a table detected on a PDF page.
`CharInfo`	Per-character layout information (glyph rectangle + page position).
`CharInfoCollection`	Collection of CharInfo entries — supports the public surface used by TextSegment.Characters but stays empty by default.
`CustomFontSubstitutionBase`	Class with 1 method.
`ExternalFontCache`	Manages the set of folders searched for external (non-embedded) TrueType/OpenType faces during rendering and conversion.
`FileFontSource`	A font source backed by a single font file on disk.
`FolderFontSource`	A font source that searches fonts in a specific directory.
`Font`	Type alias for FontInfo, matching the Font class name.
`FontAbsorber`	Collects all fonts used in a PDF document or a single page.
`FontCollection`	Collection of fonts referenced by a page.
`FontData`	Represents a font with its name and type.
`FontEmbedder`	Embeds TrueType fonts into PDF documents for custom text rendering.
`FontInfo`	Information about a font used in a PDF.
`FontRepository`	Provides access to fonts available for use in PDF documents.
`FontSource`	Base class for font sources.
`FontSourceCollection`	A collection of font sources used by FontRepository.
`FontSubstitution`	Base type for font substitutions held in FontSubstitutionCollection.
`FontSubstitutionCollection`	Class with 9 methods and 3 properties.
`FontUtilities`	Provides font management utilities for a document.
`MarkupParagraph`	A paragraph within a markup section.
`MarkupSection`	A section of text on a page — a spatially coherent group of lines.
`MemoryFontSource`	A font source backed by an in-memory font byte buffer.
`OneBasedList`	Read-only list with 1-based indexer, matching the public API.
`OriginalFontSpecification`	Class with 1 method and 3 properties.
`PageMarkup`	Represents the text markup of a single page, organized into sections.
`ParagraphAbsorber`	Absorbs text from PDF pages and organizes it into sections and paragraphs.
`ParagraphAbsorberOptions`	Options for ParagraphAbsorber controlling section detection thresholds.
`PdfFontView`	Thin engine-font view used by Aspose.Pdf parity (Font.iPdfFont).
`PhysicalTextSegment`	Physical (page-space) projection of an absorbed TextSegment.
`Position`	The Position class can be used to specify X and Y indents for layout adjustments; its XIndent and YIndent properties are read‑only after construction.
`RegexManager`	Global configuration for regular-expression text search (for example via TextFragmentAbsorber).
`SimpleFontSubstitution`	Class with 3 methods and 3 properties.
`SystemFontSource`	A font source that searches the system’s installed fonts.
`TabStop`	Represents a single tab stop position.
`TabStops`	A collection of tab stop positions for text layout.
`TableAbsorber`	Detects and extracts tables from PDF pages by analyzing text positions and line drawing operations.
`TextAbsorber`	Extracts text from PDF pages by parsing content streams.
`TextBuilder`	Appends text fragments to a PDF page by registering fonts in the page resources and writing content stream operators.
`TextEditOptions`	Options that control how text is edited (replaced, font-substituted, language-transformed).
`TextExtractionError`	Diagnostic produced by TextFragmentAbsorber when a page-level extraction fails or partially succeeds.
`TextExtractionErrorLocation`	Structured location of a TextExtractionError within a page’s content stream.
`TextExtractionOptions`	Options for text extraction operations.
`TextFormattingOptions`	Represents text formatting options for a TextParagraph.
`TextFragment`	Represents a fragment of text on a page with position and style information.
`TextFragmentAbsorber`	Searches for text fragments on PDF pages, optionally matching a search phrase.
`TextFragmentCollection`	A 1-indexed collection of TextFragment objects, matching the public API.
`TextFragmentState`	Fragment-level text formatting state.
`TextOptions`	Base class for text-processing options.
`TextParagraph`	Represents a text paragraph that can be placed on a page via AppendParagraph.
`TextReplaceOptions`	Options for text replacement operations.
`TextReplacer`	Finds and replaces text in PDF content streams.
`TextSearchOptions`	Options for text search operations in PDF documents.
`TextSegment`	A single segment within a TextFragment.
`TextSegmentCollection`	A 1-indexed collection of TextSegment objects belonging to a TextFragment.
`TextState`	Text formatting state.

Interfaces

Interface	Description
`IFontOptions`	Per-font runtime options (currently only the font-embedding error toggle).

Enumerations

Enumeration	Description
`ClippingPathsProcessingMode`	How clipping paths are processed when text edits affect clipped regions.
`CoordinateOrigin`	How the lowest Y coordinate of a text fragment is interpreted in positioning APIs (CoordinateOrigin and per-segment SetPosition overloads).
`FontReplace`	Font-replacement strategy when the original font cannot encode replacement text.
`FontSizeAdjustment`	Font size adjustment strategy when replaced text has a different size.
`FontStyles`	Represents a position on a page.
`FontSubsetStrategy`	Strategy for font subsetting when saving a document.
`FontType`	Font type classification.
`FontTypes`	Stream-loadable font formats accepted by Stream, FontTypes).
`LanguageTransformation`	Language transformation behavior (RTL, ligatures, etc).
`LineSpacingMode`	How line spacing is interpreted (font-derived vs full glyph extent).
`NoCharacterAction-Text`	Action to perform if font does not contain required character.
`ReplaceAdjustment`	Specifies how text replacement adjustments are handled.
`Scope-Text`	Replace-scope selector (canonical screaming-snake naming).
`TabAlignmentType`	Tab alignment type for tab stops.
`TabLeaderType`	Tab leader character type.
`TextFormattingMode`	Specifies how extracted text is formatted.
`TextRenderingMode`	PDF text rendering mode (Tr operator).
`WordWrapMode-Text`	Word wrap mode that controls how text wraps within a paragraph rectangle.

Vector

Class	Description
`GraphicElement`	Single vector-graphics element (path segment, image, text run) extracted from a PDF content stream.
`GraphicElementCollection`	Mutable collection of GraphicElement entries.
`GraphicsAbsorber`	Extracts the painted vector sub-paths of a page as SubPath elements, each carrying its page-space bounding Rectangle.
`SubPath`	A single painted sub-path extracted from a content stream: its construction operators (in their original user-space coordinates), the CTM in effect when it was drawn, and the painting operator that closed it.
`XFormPlacement`	Class in the Pdf NET API.

Xmp

Class	Description
`Metadata`	XMP metadata accessor exposed by per-resource members such as Metadata.
`XmpField`	One named XMP field — a (prefix, local-name) pair plus a typed value.
`XmpMetadata`	Provides access to XMP metadata embedded in the PDF.
`XmpPacketContainer`	The XMP packet exposed by getData; its WorkingPacket yields the live RDF/XML.
`XmpPdfAExtensionField`	One field of a PDF/A XMP-extension structured value type.
`XmpPdfAExtensionObject`	One PDF/A XMP-extension property/value pair.
`XmpPdfAExtensionProperty`	One PDF/A XMP-extension property declaration (name, value, value type, category, description).
`XmpPdfAExtensionSchema`	One PDF/A XMP-extension schema, holding a description and its associated XmpPdfAExtensionObjects.
`XmpPdfAExtensionSchemaDescription`	Human-readable description of a PDF/A XMP extension schema.
`XmpPdfAExtensionValueType`	One PDF/A XMP-extension structured value type, holding its fields.
`XmpValue`	Represents a typed XMP metadata value.
`XmpWorkingPacket`	A working XMP packet; GetXml returns the packet’s RDF/XML with rdf:RDF as the document element so callers can XPath into it.

Enumerations

Enumeration	Description
`XmpFieldType`	XMP field categories (matches the Aspose.Pdf reflection signature exactly — the underlying integer values are not load-bearing because callers compare against the named members).
`XmpPdfAExtensionCategoryType`	Whether a PDF/A XMP-extension property is for external (publicly visible) or internal (private) use.

Aspose.PDF FOSS for .NET

Core API

Interfaces

Enumerations

Actions

Enumerations

Annotations

Interfaces

Enumerations

Artifacts

Enumerations

Collections

Enumerations

Color

Enumerations

Comparison

Interfaces

Enumerations

Content

Structs

Enumerations

Converters

Enumerations

Devices

Interfaces

Enumerations

Drawing

Enumerations

Enums

Enumerations

Exceptions

Facades

Interfaces

Enumerations

Forms

Enumerations

Functions

Generator

Enumerations

Geometry

Groupprocessor

Helpers

Enumerations

Html

Enumerations

Interop

Interfaces

Enumerations

Io

Logicalstructure

Interfaces

Enumerations

Navigation

Enumerations

Optimization

Enumerations

Options

Enumerations

Printing

Security

Interfaces

Enumerations

Shading

Enumerations

Stamps

Structure

Tagged

Interfaces

Text

Interfaces

Enumerations

Vector

Xmp

Enumerations

See Also