Checking That the OS is 32bit or 64bit.

private void GetOSSize()
  {
     string osSize;
     if (Environment.Is64BitOperatingSystem  == true ) 
     {
         osSize= "64 Bit";
     }
     else
     {
         osSize= "32 Bit";
     }
     Console.WriteLine("OS is {0}", osSize);
 }