WPF

public AudioConferencing()
{
  Initialize();
  senderThread = new Thread(new ThreadStart(Send));
  receiverThread = new Thread(new ThreadStart(PlayAudioStream));
}

private void Send() //Send methods is used to send audio stream to the server
{
try
       {
         captureBuffer = new CaptureBuffer(captureBufferDescription, capture);
   CreateNotifyPositions();
	captureBuffer.Start(true);
	bool readFirstBufferPart = true;
	int offset = 0;
	MemoryStream memStream = new MemoryStream(halfBuffer);
       	bStop = false;
         while (!bStop)
         {
            if (bIsSendingActive)
            {
               autoResetEvent.WaitOne();
               captureBuffer.Read(offset, memStream, halfBuffer, LockFlag.None);
               byte[] dataToWrite = memStream.GetBuffer();
               SendAudioEvent(dataToWrite); //Send Audio Stream to server
            }
         }
       }
     catch (Exception ex)
     {
       MessageBox.Show(ex.Message, "VoiceChat-Send ()", MessageBoxButtons.OK);   
     }
     finally
     {
       captureBuffer.Stop();
     }
}

public void StartPlaying(byte[] AudioStream) //This methods When the client machine 
{					//get the audio stream
     playbackBuffer.Write(?, byteDecodedData, LockFlag.None);
     playbackBuffer.Play(?, BufferPlayFlags.Default);
}

binding="netTcpBinding"
bindingConfiguration="DuplexBinding"
        <nettcpbinding>
                <binding name="DuplexBinding" receivetimeout="00:00:20" sendtimeout="00:00:10">
                      maxBufferPoolSize="67108864" maxBufferSize="67108864" maxConnections="100"
                      maxReceivedMessageSize="67108864" portSharingEnabled="true">
                      <readerquotas maxstringcontentlength="67108864" maxarraylength="67108864">
                            maxBytesPerRead="67108864" />
                      <reliablesession enabled="true" />
                      <security mode="None" />
                </readerquotas></binding>
          </nettcpbinding>

<Grid>
        <Expander Name="expander1" Margin="10" IsExpanded="True" Background="Silver" 
                  Collapsed="expander1_Collapsed" Expanded="expander1_Expanded">
            <Expander.Header>
                <Image Source="E:\Tutorial\FullComponent\Ajax Loader\ajax-loader2.gif"></Image>
            </Expander.Header>
            <Expander.Content>
                <Button Margin="20" Height="30" Name="button1" Click="button1_Click">Click Me</Button>
            </Expander.Content>
        </Expander>
    </Grid>

private void playAudio()
{
objAudioConferencingPlayer.StartAudioPlayer(IncommingAudioStream);
}

public void StartAudioPlayer(byte[] AudioStream)
{
	if (!IsPlayerRunning)
            {
                StopPlaying();
                m_Player = new WaveOutPlayer(-1, fmt, 16384, 3, new 
   BufferFillEventHandler(Filler));
                IsPlayerRunning = true;
            }
            m_Fifo.Write(AudioStream, 0, AudioStream.Length);
}

private void Filler(IntPtr data, int size)
{
 if (m_PlayBuffer == null || m_PlayBuffer.Length < size)
     m_PlayBuffer = new byte[size];
            if (m_Fifo.Length >= size)
                m_Fifo.Read(m_PlayBuffer, 0, size);
            else
                for (int i = 0; i < m_PlayBuffer.Length; i++)
                    m_PlayBuffer[i] = 0;

            System.Runtime.InteropServices.Marshal.Copy(m_PlayBuffer, 0, data, size);
            // m_Fifo ==> m_PlayBuffer==> data ==> Speakers
}