需要将两个类合并在一起

我正在尝试使用wcf命名一个服务器-客户端消息传递应用程序。

到目前为止，这是服务器部分。

namespace server
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)     /// once the form loads, create and open a new ServiceEndpoint.
        {
              ServiceHost duplex = new ServiceHost(typeof(ServerWCallbackImpl));
              duplex.AddServiceEndpoint(typeof(IServerWithCallback), new NetTcpBinding(), "net.tcp://localhost:9080/DataService");
              duplex.Open();
              this.Text = "SERVER *on-line*";
        }
        private void buttonSendMsg_Click(object sender, EventArgs e)
        {
            Message2Client(textBox2.Text); /// The name 'Message_Server2Client' does not exist in the current context :(
        }
        class ServerWCallbackImpl : IServerWithCallback /// NEED TO SOMEHOW MERGE THIS ONE WITH THE FORM1 CLASS
        {
            IDataOutputCallback callback = OperationContext.Current.GetCallbackChannel<IDataOutputCallback>();
            public void StartConnection(string name)
            {
                /// client has connected
            }
            public void Message_Cleint2Server(string msg)
            {
                TextBox1.text += msg; /// 'TextBox1' does not exist in the current context :(
            }
            public void Message2Client(string msg)
            {
                callback.Message_Server2Client(msg);
            }
        }
        [ServiceContract(Namespace = "rf.services",
            CallbackContract = typeof(IDataOutputCallback),
            SessionMode = SessionMode.Required)]
        public interface IServerWithCallback           ///// what comes from the client to the server.
        {
            [OperationContract(IsOneWay = true)]
            void StartConnection(string clientName);
            [OperationContract(IsOneWay = true)]
            void Message_Cleint2Server(string msg);
        }
        public interface IDataOutputCallback          ///// what goes from the sertver, to the client.
        {
            [OperationContract(IsOneWay = true)]
            void AcceptConnection();
            [OperationContract(IsOneWay = true)]
            void Message_Server2Client(string msg);
        }
    }
}

我只是无法弄清楚，我如何合并"类Form1:Form"answers"类ServerWCallbackImpl: IServerWithCallback"，这样我就能够从一个按钮点击诱导Message2Client函数，以及添加TextBox1。text += msg当*Message_Cleint2Server*发生时

谢谢!