C# (pronounced C Sharp) is a computer language developed by Microsoft but made available to the general public through international standards. The current release is termed as 3.0.

This series of lessons teach C# (3.0) as a computer language, not to be confused with Microsoft Visual C# or any other programming environment that uses C#. To follow these lessons, you should have the ability to create, compile, and execute console applications. You can use the .NET Framework that includes the csc.exe compiler but, as an alternative, you can (should) use Microsoft Visual C# 2008 Professional or you can use Microsoft Visual C# 2008 Express Edition that you can freely download from the Microsoft web site.