DotNetNuke in C# ?

Question

Hello,

Has anyone tried to download the C# version of the DNN? via the "subversion" utility? http://code.google.com/p/cs-dotnetnuke/

Or found a C# version of the DNN or a C# version of a portal like DNN with similar functionality and support?

Or recommend a portal that they've found/created using C# for learning puposes that has a simple framework that easy to understand and start with?

Thanks very much!
BobK