Hi all,

I'm trying to develop a server that listens to incoming calls using
the asycnhronous methods BeginAccept / EndAccept. I start the server
(till this point it is ok) and few seconds later I stop it (with no
clients connected). Once I press the stop button an
ObjectDisposedException is fired. What is the reason for this? Is it
because the thread is still running even after I closed the server
socket? Here is the code:

private void btnStart_Click(object sender, EventArgs e)
       {
           btnStart.Enabled = false;
           mniStart.Enabled = false;
           btnStop.Enabled = true;
           mniStop.Enabled = true;

           try
           {
               sListener.BeginAccept(new
AsyncCallback(AcceptCallback), sListener);
               lblStatus.Text = "Waiting for a connection...";
           }
           catch (SocketException se)
           {
               MessageBox.Show(se.Message, "VEP Server Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
           }
       }

       private void btnStop_Click(object sender, EventArgs e)
       {
           btnStop.Enabled = false;
           mniStop.Enabled = false;
           btnStart.Enabled = true;
           mniStart.Enabled = true;

           try
           {
               lblStatus.Text = "Stopped";
               //sListener.Shutdown(SocketShutdown.Both);
               sListener.Close();
           }
           catch (SocketException se)
           {
               MessageBox.Show(se.Message, "VEP Server Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
           }
       }

       private void AcceptCallback(IAsyncResult ar)
       {
           Socket listener = (Socket)ar.AsyncState;
           Socket sHandler = listener.EndAccept(ar);
<---------------Exception fired here

           MessageBox.Show("Connected with " +
sHandler.RemoteEndPoint.ToString());
       }

Thanks in advance for your help,
Clayton