Hey there,
I noticed a tiny issue with the C# Type Generator… If there is a escaped character description in ApiMember attribute for a Request DTO, the resulting generated CSharp DTO does not contain the escape sequence. i.e.
[ApiMember(ParameterType = "model", Description = "Description with a backslash - \\"]
Turns into
[ApiMember(ParameterType = "model", Description = "Description with a backlash - \"]
… in the generated csharp code.
I think this is an old problem (i.e. not introduced in 5.1), but your recent work in new type generators reminded me to post about it 
Not sure if Add Servicestack Reference does anything to help with this, I’m just looking at the source in /types/csharp.