GetCommandLineArgs()

Notice that when you use this method the first element of the array is the name of the executable itself and the second element is the first command line argument.

This differs from the array passed by the OS as an argument to the Main() method where the first element is the first command line argument and so on.

it returns the command line arguments for the current process, you can retrieve the results like this:

String[] arguments = Environment.GetCommandLineArgs();
Console.WriteLine("Arguments: {0}", String.Join(", ", arguments));