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wcf 客户端不稳定问题

在模拟多个客户端访向服务:
用多线程以循环方式访问服务,但经常自动退出,出现不稳定情况。 --------------------编程问答-------------------- 不上错误信息你就说不稳定? --------------------编程问答-------------------- 客户端代码:

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private delegate void WriteDelegate(string msg);
        private void Write(string msg)
        {
            if (richTextBox1.InvokeRequired)
            {
                WriteDelegate w = new WriteDelegate(Write);
                this.Invoke(w, msg);
            }
            else
            {
                richTextBox1.AppendText(msg + "\r\n");
                richTextBox1.ScrollToCaret();
            }
        }


        private void btnRun_Click(object sender, EventArgs e)
        {
            StartThread startThread = new StartThread(this);
            startThread.Start();
        }

        class StartThread
        {
            private Form1 form;
            private Thread myThread;

            public StartThread(Form1 form)
            {
                this.form = form;

                myThread = new Thread(Run);
                this.myThread.IsBackground = false;
            }

            public void Start()
            {
                myThread.Start();
            }

            void Run()
            {
                for (int i = 0; i < 1000; i++)
                {
                    MyThread myThread = new MyThread(form, i);
                    myThread.Start();
                }
            }
        }


        class MyThread
        {
            private int no;
            private Form1 form;
            private Thread myThread;

            public MyThread(Form1 form, int no)
            {
                this.no = no;
                this.form = form;

                myThread = new Thread(Run);
                this.myThread.IsBackground = false;
            }

            public void Start()
            {
                myThread.Start();
            }

            void Run()
            {
                for (int i = 0; i < 10000000; i++)
                {
                    double rs = 0;
                    string str = string.Empty;
                    ICalculator proxy = null;
                    try
                    {
                        EndpointAddress ea = new EndpointAddress("net.tcp://localhost:9999/CalculatorService");

                        //proxy = ChannelFactory<ICalculator>.CreateChannel(new NetTcpBinding(), ea);
                        //ICalculator proxy = DuplexChannelFactory<ICalculator>.CreateChannel(new InstanceContext(new CalculatorCallBack()), new NetTcpBinding(), ea);



                        //ChannelFactory<ICalculator> channelFactory = new ChannelFactory<ICalculator>(new NetTcpBinding(), ea);

                        //proxy = channelFactory.CreateChannel();
                        proxy = DuplexChannelFactory<ICalculator>.CreateChannel(new NetTcpBinding(), ea);

                        rs = proxy.Add(10, 20, out str);
                        //Thread.Sleep(3000);

                        (proxy as ICommunicationObject).Close();
                    }
                    catch (TimeoutException)
                    {
                        if (proxy != null)
                            (proxy as ICommunicationObject).Abort();
                    }
                    catch (CommunicationException)
                    {
                        if (proxy != null)
                            (proxy as ICommunicationObject).Abort();
                    }
                    catch
                    {
                        string abc = "";
                    }
                    //form.Write(string.Format("{0:d3}  :10 + 20 = {1}", no, rs));
                    form.Write(string.Format("{0}  {1:d3} - {2:d10}  :10 + 20 = {3}", str, no, i, rs));

                }

                //form.Write(string.Format("{0:d3}  Finished", no));
            }
        }


    }

会出现以下种情況:
1.客戶端自动关闭,VS 无报错;
2.DisconnectedContext was detected(內容 '0x1b6f0760' 已中斷連接。正在從目前的內容 (內容 0x1b6f0510) 釋放介面。這可能會導致損毀或資料遺失。若要避免這個問題,請確認所有內容/Apartment 是否能保持運作,直到應用程式不再使用 RuntimeCallableWrapper 為止 (它代表在這些內容/Apartment 內部運作的 COM 元件) 。)
3.把代码改为单线,也会出现以上情況,.....HELP!!!

第一次使用WCF,还请各位高手指教一下! --------------------编程问答-------------------- 请高手指教!
补充:.NET技术 ,  Web Services
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