ASP.net File uploader check exe files

const int ERROR_BAD_EXE_FORMAT = 193;
            try
            {
                ProcessStartInfo psi = new ProcessStartInfo();
                psi.UseShellExecute = false;
                //psi.FileName = @"C:\\Region.xml";
                psi.FileName = @"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe";
                Process.Start(psi);
            }
            catch (Win32Exception ex)
            {
                if (ex.NativeErrorCode == ERROR_BAD_EXE_FORMAT)
                {
                    // The exception message would be
                    // "The specified executable is not a valid application for this OS platform."
                    //
                    Console.WriteLine("Not a valid executable.");
                }
                else
                {
                    throw;
                }
            }