Added C# sample

Added C# sample code.
Removed references, namespace, etc

Removed the references, namespace, class and method information
resulting in a simple example.
Cloud Block Storage samples for .NET (C#)

All the Cloud Block Storage samples for .NET (in C# only) have been
created.
Merge pull request #268 from DonSchenck/master

Added C# sample for cloud-block-storage/authentication