| BlankLineBlock | A blank line, used internally by some parsers to store blank lines in a container. They are removed before the end of the document. |
| Block | Base class for a block structure. Either a LeafBlock or a ContainerBlock. |
| BlockExtensions | Extensions for Block |
| CharIteratorHelper | Helpers for the ICharIterator class. |
| CodeBlock | Represents an indented code block. |
| CodeBlock.CodeBlockLine | Represents the CodeBlockLine type. |
| ContainerBlock | A base class for container blocks. |
| DataKey<T> | A typed key used to store data on IMarkdownObject instances. |
| EmptyBlock | Block representing a document with characters but no blocks. This can happen when an input document consists solely of trivia. |
| FencedCodeBlock | Represents a fenced code block. |
| HeadingBlock | Represents a heading. |
| HtmlBlock | Represents a group of lines that is treated as raw HTML (and will not be escaped in HTML output). |
| LeafBlock | Base class for all leaf blocks. |
| LinkReferenceDefinition | A link reference definition (Section 4.7 CommonMark specs) |
| LinkReferenceDefinitionExtensions | Extension methods for accessing LinkReferenceDefinition attached at the document level. |
| LinkReferenceDefinitionGroup | Contains all the LinkReferenceDefinition found in a document. |
| ListBlock | A list (Section 5.3 CommonMark specs) |
| ListItemBlock | A list item (Section 5.2 CommonMark specs) |
| MarkdownDocument | The root Markdown document. |
| MarkdownObject | Base implementation for a the Markdown syntax tree. |
| MarkdownObjectDataExtensions | Typed helper methods for storing and retrieving data on IMarkdownObject. |
| MarkdownObjectExtensions | Extensions for visiting Block or Inline |
| ParagraphBlock | Represents a paragraph. |
| QuoteBlock | A block quote (Section 5.1 CommonMark specs) |
| QuoteBlockLine | Represents trivia per line part of a QuoteBlock. Trivia: only parsed when MarkdownPipeline.TrackTrivia is enabled. |
| ThematicBreakBlock | Represents a thematic break (Section 4.1 CommonMark specs). |