C# is a Microsoft language standard.  

It was introduced with the [.NET] Framework.

Visual Studio .NET ships with a C# compiler.

[Mono] is an [Open Source] version of C# and its related libraries.

 [explain how it's like Java and C++]
 [who was the main designer of C#?]
 [what is it used for?]
 [can it be used with Tcl or Tk?]