C# 關閉UDP時如何處理？

[bb_chen]

我在點擊一個按鈕時，會彈出一個窗體Form2,
private void Form2_Load(object sender, EventArgs e)
{
GlobalUDP.UDPClient = new UdpClient();
GlobalUDP.EP = new IPEndPoint(IPAddress.Parse("255.255.255.255"), 26868);

IPEndPoint BindEP = new IPEndPoint(IPAddress.Any, 26868);
byte[] DiscoverMsg = Encoding.ASCII.GetBytes("Discovery:Who is out there?");

GlobalUDP.UDPClient.Client.Bind(BindEP);
GlobalUDP.UDPClient.MulticastLoopback = false;
GlobalUDP.UDPClient.EnableBroadcast = true;

//Configure ourself to receive discovery responses
GlobalUDP.UDPClient.BeginReceive(ReceiveCallback, GlobalUDP);

// Transmit the discovery request message
GlobalUDP.UDPClient.Send(DiscoverMsg, DiscoverMsg.Length, new System.Net.IPEndPoint(System.Net.IPAddress.Parse("255.255.255.255"), 26868));
}

當關閉Form2窗體，並再次點開Form2窗體時，會出現如下錯誤：
Only one usage of each socket address (protocol/network address/port) is normally permitted

請教：應該在關閉窗體時如何處理？

[bb_chen]

UP

[shily_fly]

关注，UP上去

[bb_chen]

HELP

[bb_chen]

HELP

[zlkingdom]

在你关闭窗体时要把资源释放完

[bb_chen]

 private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
                try
                {
                    //GlobalUDP.EP = null;
                    if (GlobalUDP.UDPClient.Client != null)
                    {
                        GlobalUDP.UDPClient.Client.Shutdown(System.Net.Sockets.SocketShutdown.Both);
                        GlobalUDP.UDPClient.Client.Disconnect(false);
                        GlobalUDP.UDPClient.Close();
                    }
                }
                catch
                { }
        }

上面代碼為關閉窗體時釋放了資源。
但是這樣在再開窗體時，會出現下面這個錯誤：
A request to send or receive data was disallowed because the socket had already been shut down in that direction with a previous shutdown call

[bb_chen]

UP

[bb_chen]

UP

[baichangle]

GlobalUDP.UDPClient.Client.Disconnect(true);