ช่วยดูโค้ดโปรแกรมให้หน่อยค่ะ เป็นภาษา C# มันติด error ไม่รู้ว่ามันคืออะรัยค่ะ คือตอนนี้กำลังเขียนโปรแกรมรับส่งไฟล์ผ่านเครื่อข่ายค่ะ

Console.Write("Please input path file :");
string filename = Console.ReadLine();
byte[] buffer = ReadImageFile(filename); 

using System;
using System.Drawing;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Text;
using System.Windows.Forms;

class Server : Form
{
   private TextBox txtPath;
   private Label lblStatus;
   private Button btnSend;
   Socket clientSocket;
   public Server()
   {
        Text = "ตัวอย่าง Server Tranfer file นะครับ.";
        Size = new Size(400,150);

        txtPath = new TextBox();
        txtPath.Parent = this;
        txtPath.Size = new Size(300, 2 * Font.Height);
        txtPath.Location = new Point(5, 14);

        Button btnBrowse = new Button();
        btnBrowse.Text = "เลือก File";
        btnBrowse.Parent = this;
        btnBrowse.Size = new Size(6 * Font.Height, 2 * Font.Height);
        btnBrowse.Location = new Point(310, 10);
        btnBrowse.Click += new EventHandler(btnBrowse_OnClick);

        btnSend = new Button();
        btnSend.Text = "ส่ง File";
        btnSend.Parent = this;
        btnSend.Size = new Size(6 * Font.Height, 2 * Font.Height);
        btnSend.Location = new Point(310, 50);
        btnSend.Click += new EventHandler(btnSend_OnClick);
        btnSend.Enabled = false;

        lblStatus = new Label();
        lblStatus.Parent = this;
        lblStatus.Text = "ขณะนี้กำลังรอ Client ติดต่อมาอยู่";
        lblStatus.AutoSize = true;
        lblStatus.Location = new Point(5, 50);

   }
   void btnBrowse_OnClick(object obj, EventArgs ea)
   {
       OpenFileDialog browseFile = new OpenFileDialog();
       browseFile.Title = "Browse file";
       if (browseFile.ShowDialog() == DialogResult.Cancel)
           return;
       try
       {
           txtPath.Text = browseFile.FileName;
       }
       catch (Exception)
       {
           MessageBox.Show("Error opening file", "File Error",
           MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
       }

       Socket sListen = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
       IPAddress IP = IPAddress.Parse("127.0.0.1");
       IPEndPoint IPE = new IPEndPoint(IP, 4321);
       sListen.Bind(IPE);
       sListen.Listen(2);

       while (true)           
        {                            
            try              
            {                    
                clientSocket = sListen.Accept();
                lblStatus.Text = "Client ติดต่อมาแล้ว กดส่ง File ได้";
                btnSend.Enabled = true;
                return;
                
            }               
            catch               
            {                    
                throw;               
            }
       }

   }

    private static byte[] ReadImageFile(String img)       
    {            
        FileInfo fileinfo = new FileInfo(img);           
        byte[] buf = new byte[fileinfo.Length];           
        FileStream fs = new FileStream(img, FileMode.Open, FileAccess.Read);           
        fs.Read(buf, 0, buf.Length);            
        fs.Close();           
        GC.ReRegisterForFinalize(fileinfo);           
        GC.ReRegisterForFinalize(fs);            
        return buf;        
    }

   void btnSend_OnClick(object obj, EventArgs ea)
   {
            byte[] buffer = ReadImageFile(txtPath.Text); 
            clientSocket.Send(buffer, buffer.Length, SocketFlags.None);
            lblStatus.Text = "ส่ง File เรียบร้อยแล้วครับ "; 
   }

    public static void Main()
    {
        Application.Run(new Server());
    }
}