private void m_pToggleSend_Click(object sender,EventArgs e)
        {
            if(m_pAudioInRTP == null){
                m_pSendStream = m_pSession.CreateSendStream();

                m_pAudioInRTP = new AudioIn_RTP(AudioIn.Devices[m_pInDevices.SelectedIndex],20,m_pMainUI.AudioCodecs,m_pSendStream);
                m_pAudioInRTP.Start();

                m_pTimer = new Timer();
                m_pTimer.Interval = 500;
                m_pTimer.Tick += delegate(object s1,EventArgs e1){
                    m_pCodec.Text       = m_pAudioInRTP.AudioCodec.Name;
                    m_pPacketsSent.Text = m_pSendStream.RtpPacketsSent.ToString();
                    m_pKBSent.Text      = Convert.ToString(m_pSendStream.RtpBytesSent / 1000);
                };
                m_pTimer.Start();

                m_pToggleSend.Text = "Stop";
            }
            else{
                m_pTimer.Dispose();
                m_pTimer = null;
                m_pAudioInRTP.Dispose();
                m_pAudioInRTP = null;
                m_pSendStream.Close();
                m_pSendStream = null;

                m_pToggleSend.Text = "Send";
            }
        }
 private void btnCall_Click_1(object sender, RoutedEventArgs e)
 {
     IsConnected = false;
     m_pSession  = m_pRtpSession.Sessions[0];
     if (m_pAudioInRTP == null)
     {
         m_pSendStream = m_pSession.CreateSendStream();
     }
     else
     {
         m_pAudioInRTP.Dispose();
         m_pAudioInRTP = null;
         m_pSendStream.Close();
         m_pSendStream = null;
     }
     // _soundSender.Start();
     // _soundReceiver.Start();
 }