如何使 TCP 客户端接受主机

我的TCP客户端应该：

1. 接受主机、端口和文本字符串。
2. 连接到主机/端口并在单击按钮时发送字符串（+两行馈送 ''r'''r'）。
3. 然后读取结果并将结果放回文本框中。

我得到端口和字符串结果的问题，但我没有得到关于主机的任何信息。

这是我到目前为止得到的：

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using System.Net;
    using System.IO;
    using System.Net.Sockets;

   namespace TCP_Client
   {
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }
    private void button1_Click(object sender, EventArgs e)
    {
        string port = port1.Text;
        int myParsedInt = Int32.Parse(port);
        System.Net.IPAddress[] adresslist = Dns.GetHostAddresses(host1.Text);
        Socket connectSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        connectSocket.Connect(adresslist[0], myParsedInt);
        System.IO.StreamReader connectionRead = new System.IO.StreamReader(new NetworkStream(connectSocket));
        connectSocket.Send(System.Text.Encoding.UTF8.GetBytes(sendText.Text + "'r'n"));
        while (connectionRead.Peek() >= 0)
        {
            this.textOutput.AppendText(connectionRead.ReadLine() + "'r'n");
        }
        connectSocket.Close();
    }
    private void textOutput_TextChanged(object sender, EventArgs e)
    {
    }
    private void host1_TextChanged(object sender, EventArgs e)
    {
    }
    private void port1_TextChanged(object sender, EventArgs e)
    {
    }
    private void sendText_TextChanged(object sender, EventArgs e)
    {
    }
}
}