c# Winform使用IP连接设备

我需要创建一个应用程序，允许用户通过wifi连接到设备(将发送参数/命令的硬件)(wifi是最终目标，但我正在解决任何连接)，然后向所述设备发送命令。我知道一些c#和一些套接字/IP的东西，但不是使用c#的套接字/IP。程序的可视化、GUI方面并不是我所纠结的。我似乎不能得到套接字启动和运行，并作出任何真正的连接。我一直得到"提供了无效参数"异常。

关于这个特定问题的任何提示或c#网络/套接字等的帮助。欢迎。

声明一个新的套接字:

Socket sck;
sck = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

当它尝试处理"sck = new Socket(…);"时抛出异常。

问题代码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net.Sockets;
using System.Net;
using System.Threading;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Text.RegularExpressions;
namespace InternetConnect
{
    public partial class Form1 : Form
    {
        // Global Variables
        int portNumber = 0;
        string ipAddress = "";
        TcpClient client;
        Socket sck;
        EndPoint epLocal, epRemote;
        // Needs to be defined at some point
        // These are just holding a place for now
        string extraIP = "127.0.0.1";
        string extraPort = "135";
        public Form1()
        {
            InitializeComponent();
            try
            {
                sck = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                sck.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
            }
            catch (SocketException ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        private void connectButton_Click(object sender, EventArgs e)
        {
            try
            {
                epLocal = new IPEndPoint(IPAddress.Parse(ipAddressTextBox.Text), Convert.ToInt32(portNumberTextBox.Text));
                MessageBox.Show("Before Bind");
                sck.Bind(epLocal);
                MessageBox.Show("After Bind");
                epRemote = new IPEndPoint(IPAddress.Parse(extraIP), Convert.ToInt32(extraPort));
                sck.Connect(epRemote);
                MessageBox.Show("After Connect");
                byte[] buffer = new byte[1500];
                sck.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref epRemote, new AsyncCallback(MessageCallBack), buffer);
                connectButton.Text = "Connected";
                connectButton.Enabled = false;
                sendButton.Enabled = true;
                outgoingTextBox.Focus();
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            ipAddress = ipAddressTextBox.Text;
            // To make sure there are no letters in the IP Address
            int errorCounter = Regex.Matches(ipAddress, @"[a-zA-Z]").Count;
            if (errorCounter == 0)
            {
                if (ipAddress != "")
                {
                    // To make sure the port number is entered without letters
                    if (int.TryParse(portNumberTextBox.Text, out portNumber))
                    {
                        WriteToStatusBar("IP Address and Port Number Valid");
                    }
                    else
                    {
                        MessageBox.Show("Please enter a valid Port Number.");
                    }
                }
                else
                {
                    MessageBox.Show("Please enter a valid IP Address.");
                }
            }
            else
            {
                MessageBox.Show("Please enter a valid IP Address.");
            }
            #endregion
            try
            {
                client = new TcpClient();
                WriteToStatusBar("Connecting...");
                client.Connect(ipAddress, portNumber);
                WriteToStatusBar("Connected");
                outgoingTextBox.Text = "Enter message to be sent to the device...";
                client.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
}

stream.Write(data, 0, data.Length);
stream.Write(data, 0, data.Length);

stream.Close();         
client.Close();