So Here is how I fixed it:
First I added a Boolean called IsListening.
Next I changed condition that keeps the ear listening to While(IsListening).
In the stop method, I put set the IsListening variable to false before calling ear.close() and lastly I do a check for the ear inside of the AcceptCallback after the Manual SetEvent.
The end result looks like this:
private static ManualResetEvent allDone = new ManualResetEvent(false);
private Socket ear;
public void Start()
{
new Thread(() => StartListening()).Start();
}
private void StartListening()
{
IP = Dns.GetHostAddresses(Dns.GetHostName()).Where(address => address.AddressFamily == AddressFamily.InterNetwork).First();
port = 11221;
IPEndPoint localEndPoint = new IPEndPoint(IP, Port);
ear = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
ear.Bind(localEndPoint);
ear.Listen(100);
IsListening = true;
while (IsListening)
{
allDone.Reset();
ear.BeginAccept(new AsyncCallback(AcceptCallback), ear);
allDone.WaitOne();
}
Console.WriteLine("Socket Closed");
}
private void AcceptCallback(IAsyncResult ar)
{
allDone.Set();
if (IsListening == false) return;
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
StateObject state = new StateObject();
state.workSocket = handler;
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
}
public static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty;
StateObject state = (StateObject) ar.AsyncState;
Socket handler = state.workSocket;
int bytesRead = handler.EndReceive(ar);
if (bytesRead > 0) {
state.sb.Append(Encoding.ASCII.GetString(state.buffer,0,bytesRead));
content = state.sb.ToString();
if (content.IndexOf("<EOF>") > -1) {
Console.WriteLine("Read {0} bytes from socket. \n Data : {1}", content.Length, content );
}
else
{
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
}
}
public void Stop()
{
IsListening = false;
ear.Close();
}
The exception is now gone. I hope this helps someone else!