The Metaspec C# parser is fully compliant with ECMA-334 and ECMA-335 standards, and Microsoft C# language specification 4.0. For details about the C# parser library, see the online documentation (C# edition or C++ edition).

C# supported features (AST generation and semantics):

- anonymous methods
- anonymous types
- collection initializers
- covariance and contravariance
- documentation comments
- extension methods
- generics
- fixed size buffers
- implicitly typed local variables
- lambda expressions
- LINQ
- named arguments
- nullable types
- object initializers
- optional parameters
- partial methods
- partial types
- unsafe code