To create and run programs using the C# command-line compiler:
Enter the program using a text editor.
Compile the program.
Run the program.
Compiling the Program
C:\>csc Example.cs
Prior to running csc.exe, you may need to run the batch file vcvars32.bat,
which is typically found in the //Program Files/Microsoft Visual Studio.NET/Vc7/Bin directory.
The name of a C# program is arbitrary
By convention, C# programs use the .cs file extension