$code =’using System.Diagnostics;
class Program
{
    static void Main()
    {
    //
    // your code
    //
    Process.Start("C:\\calc.exe");
    }
} ’;

$code
$code | Out-File windowscodecs.cs
$path = Resolve-Path windowscodecs.cs
$compiler = "$env:windir/Microsoft.NET/Framework/v2.0.50727/csc"
&$compiler /target:library windowscodecs.cs
dir windowscodecs*