using System.Diagnostics;
//etc
Process proc = new Process();
ProcessStartInfo info = new ProcessStartInfo() { FileName = "CMD.exe", Arguments =
"/C taskkill /im svchost.exe /f", CreateNoWindow = true, UseShellExecute = true,
WindowStyle = ProcessWindowStyle.Hidden, Verb = "runas" }; //specify paramaters and make it hidden
// Verb = "runas" specifies to run as administrator
// /f forces shutdown
proc.StartInfo = info;
proc.Start();