| Bold | Bold element - markup helper for indicating bolded content. Equivalent to a Span with FontWeight property set to FontWeights.Bold. Can contain other inline elements. |
| Inline | Inline element. |
| InlineCollection | A collection of Inlines. |
| InlineUIContainer | InlineUIContainer - a wrapper for embedded UIElements in text flow content inline collections |
| Italic | Italic element - markup helper for indicating italicized content. Equivalent to a Span with FontStyle property set to FontStyles.Italic. Can contain other inline elements. |
| LineBreak | LineBreak element that forces a line breaking. |
| Run | A terminal element in text flow hierarchy - contains a uniformatted run of unicode characters |
| Span | Span element used for grouping other Inline elements. |
| TextElement | TextElement is an base class for content in text based controls. TextElements span other content, applying property values or providing structural information. |
| Underline | Underline element - markup helper for indicating superscript content. Equivalent to a Span with TextDecorations property set to TextDecorations.Underlined. Can contain other inline elements. |