Forking this feature request from #16

Original post: #16 (comment) by @MrJul

Pertinent APIs: http://source.roslyn.codeplex.com/#Microsoft.CodeAnalysis.CSharp/Symbols/TypeSymbolExtensions.cs,8f632696b9da5eba

In my team, I've seen different developers copy-paste portions of ITypeSymbolExtensions into our own project (e.g. IsNullableType, GetNullableUnderlyingType , GetBaseTypes ), which is a shame - these methods are a convenience I'm sure many other people will find useful as well.