public class ClientSocketModelConnectedEvent:EventArgs

    {

        private string param;

        public string Data

        {

            get

            {

                return param;

            }

            set

            {

                value = param;

            }

        }

        public ClientSocketModelConnectedEvent(string data)

        {

            this.param = data;

        }

    }

    public delegate void delConnectedEvent(object sender, ClientSocketModelConnectedEvent _ClientSocketModelConnectedEvent);

 //定义事件，当客户端成功连接server后就触发此事件

        public event delConnectedEvent ConnectedServer;

   private void ConnectedReceive(IAsyncResult ar)

        {

            CurrnetClientSocket = ar.AsyncState as Socket;

            CurrnetClientSocket.EndReceive(ar);

            string data = Encoding.UTF8.GetString(bufferSize);

            if (ConnectedServer != null)

            {

                this.ConnectedServer(this, new ClientSocketModelConnectedEvent(data));

            }

        }