private void frmGroupChat_Load(object sender, EventArgs e) { if (this.m_RoomJid != null) { Presence presence = new Presence(); Jid jid = new Jid(this.m_RoomJid.ToString()); jid.set_Resource(this.m_Nickname); presence.set_To(jid); this.m_XmppCon.Send(presence); } }