You can either use a command line compiler available from Microsoft or third party compiler kit such as the one developed by Mono.
Microsft, Mono.

C# IDE's


http://www.isharpdevelop.com/
http://www.c-point.com/csharp.htm
http://www.borland.com/csharpbuilder
http://www.borland.com/codewright
http://www.editplus.com/

Some C# tutorials


http://msdn.microsoft.com/en-us/library/kx37x362.aspx
http://www.c-sharpcorner.com/
C# Tutorials and Source Code
Go4Expert C# Forums

C# application using Command Line Compilers?


command> csc HelloWorld.cs
Output> HelloWorld

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