public void sendChatChecked(int seq, string consumer, string lastMessageId)
{
#if !SILVERLIGHT
send_sendChatChecked(seq, consumer, lastMessageId);
recv_sendChatChecked();
#else
var asyncResult = Begin_sendChatChecked(null, null, seq, consumer, lastMessageId);
End_sendChatChecked(asyncResult);
#endif
}
#if SILVERLIGHT