An HTML/Text Editing Control/Component by Actipro Software LLC

The .NET Languages Add-on implements advanced C#/VB.NET languages for use with the SyntaxEditor code editing control.

Major features of the .NET languages add-on that can be used by any .NET language that is implemented include:
An assembly repository that stores reflection information for .NET assemblies at run-time.
Ability to cache all reflection and documentation to data files which can be loaded extremely quickly once built.
A project resolver that manages external references (assemblies) for a "project" and coordinates reflection data between the assemblies and code files.
Over 100 AST node classes for representing .NET code in an AST.
Easy display of a compilation unit in a code outline TreeView.
A type/member drop-down list control that can bind to a SyntaxEditor control.

Major features of the C#/VB language include:
Detailed lexical parsing of tokens down to specific keyword/operator level by using a fast programmatic lexical parser.
Semantic parser that conforms to the .NET 2.0 C#/VB specification, including generics, and uses the semantic parser service.
Semantic parser builds an AST based on document text.
Automatic outlining based on compilation unit.
Reporting and automatic display of syntax errors.
Automated IntelliPrompt code snippets, complete word, member lists, parameter info, and quick info.
IntelliPrompt tips with icons and highlighted text.
XML comment auto-complete.
Smart indent with configurable options.
Code block selection.
Line commenting.
Specialized C#/VB text statistics for counting commented lines and determining comment coverage.
Much more.