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# 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 C# 2.0 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# text statistics for counting commented lines and determining comment coverage.
• Much more.