public void updateC2DMRegistrationId(string registrationId)
{
#if !SILVERLIGHT
send_updateC2DMRegistrationId(registrationId);
recv_updateC2DMRegistrationId();
#else
var asyncResult = Begin_updateC2DMRegistrationId(null, null, registrationId);
End_updateC2DMRegistrationId(asyncResult);
#endif
}
#if SILVERLIGHT