ขอความช่วมเหลือ c# มี code ที่ดูว่า เครื่องเป็น windows 32bit หรือ 64bit ไหมครับ

public static class Wow
{
  public static bool Is64BitProcess
  {
    get { return IntPtr.Size == 8; }
  }

  public static bool Is64BitOperatingSystem
  {
    get
    {
      // Clearly if this is a 64-bit process we must be on a 64-bit OS.
      if (Is64BitProcess)
        return true;
      // Ok, so we are a 32-bit process, but is the OS 64-bit?
      // If we are running under Wow64 than the OS is 64-bit.
      bool isWow64;
      return ModuleContainsFunction("kernel32.dll", "IsWow64Process") && IsWow64Process(GetCurrentProcess(), out isWow64) && isWow64;
    }
  }

  static bool ModuleContainsFunction(string moduleName, string methodName)
  {
    IntPtr hModule = GetModuleHandle(moduleName);
    if (hModule != IntPtr.Zero)
      return GetProcAddress(hModule, methodName) != IntPtr.Zero;
    return false;
  }

  [DllImport("kernel32.dll", SetLastError=true)]
  [return:MarshalAs(UnmanagedType.Bool)]
  extern static bool IsWow64Process(IntPtr hProcess, [MarshalAs(UnmanagedType.Bool)] out bool isWow64);
  [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError=true)]
  extern static IntPtr GetCurrentProcess();
  [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
  extern static IntPtr GetModuleHandle(string moduleName);
  [DllImport("kernel32.dll", CharSet = CharSet.Ansi, SetLastError=true)]
  extern static IntPtr GetProcAddress(IntPtr hModule, string methodName);
}