多线程UDP客户端/服务器C#

我正试图让一个多线程UDP客户端/服务器运行，但我在服务器端遇到了问题。当客户端尝试注册时，会创建一个线程，并在该线程中处理该客户端的所有交互，但由于某种原因，它只进入该线程一次，然后立即退出。。有人能帮我弄清楚为什么会发生这种事吗-提前谢谢。。

namespace AuctionServer
{
   class Program
   {
    public static Hashtable clientsList = new Hashtable();
    static void Main(string[] args)
    {
        //IPAddress ipAd = IPAddress.Parse("255.255.255.255");
        UdpClient server = new UdpClient(8888);
        IPEndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
        string data = "";
        int listSize = 0;
        Console.WriteLine("Auction Server Started ....");
        listSize = clientsList.Count;
        while (true)
        {
            //Reads data
            byte[] inStream = server.Receive(ref remoteEndPoint);
            data = Encoding.ASCII.GetString(inStream);
            //Console.WriteLine("REGISTER " + remoteEndPoint);
            if (!data.Contains("DEREGISTER "))
            {
                byte[] sendBytes = Encoding.ASCII.GetBytes(data + remoteEndPoint.ToString());
                server.Send(sendBytes, sendBytes.Length, remoteEndPoint);
                handleClinet client = new handleClinet();
                Console.WriteLine(data);
                clientsList.Add(data, server);
                client.startClient(server, data, clientsList, remoteEndPoint);
                data = "";
            }
        }
    }
    //Broadcast method is used to send message to ALL clients
    public static void broadcast(UdpClient dest, string msg, string uName, bool flag, IPEndPoint sendEP, Hashtable clientsList)
    {
        foreach (DictionaryEntry Item in clientsList)
        {
            Byte[] broadcastBytes = null;
            if (flag == true)
            {
                broadcastBytes = Encoding.ASCII.GetBytes(msg);
            }
            else
            {
                broadcastBytes = Encoding.ASCII.GetBytes(msg);
            }
            dest.Send(broadcastBytes, broadcastBytes.Length, sendEP);
        }
    }
}//end Main class

}

namespace AuctionServer
{
public class handleClinet
{
    UdpClient clientSocket;
    string clNo;
    Hashtable clientsList;
    IPEndPoint remoteIPEndPoint = new IPEndPoint(IPAddress.Any, 0);
    IPEndPoint myEP = new IPEndPoint(IPAddress.Any, 0);
    public void startClient(UdpClient inClientSocket, string clineNo, Hashtable cList, IPEndPoint tempEP)
    {
        this.myEP = tempEP;
        this.clientSocket = inClientSocket;
        this.clNo = clineNo;
        this.clientsList = cList;
        Thread ctThread = new Thread(doChat);
        ctThread.Start();
    }
    private void doChat()
    {
        int requestCount = 0;
        byte[] bytesFrom = new byte[10025];
        string dataFromClient = null;
        string rCount = null;
        requestCount = 0;
        while ((true))
        {
            try
            {
                //Thread.Sleep(1000);
                if (requestCount == 0)
                {
                    Console.WriteLine("Thread Created");
                    requestCount++;
                }
                byte[] received = clientSocket.Receive(ref remoteIPEndPoint);
                dataFromClient = Encoding.ASCII.GetString(received);
                Console.WriteLine(dataFromClient);
                if (dataFromClient.Contains("DEREGISTER"))
                    clientSocket.Send(received, received.Length, remoteIPEndPoint);
                    //Program.broadcast(clientSocket, "DREG-CONF", clNo, true, myEP, clientsList);
                //else
                //    Program.broadcast(clientSocket, dataFromClient, clNo, true, myEP, clientsList);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                Console.ReadKey();
                break;
            }
        }//end while
    }//end doChat

}