listbox.invoke报错，listbox中未包含invoke的定义

[咩~~]

bool isOpen = true;
void ListenConnectSocket()
{
while (isOpen)
{
try
{
Socket ClientSocket = serverSocket.Accept();
byte[] buffer = Encoding.Default.GetBytes("成功连接到服务器！");
ClientSocket.Send(buffer);
string client = ClientSocket.RemoteEndPoint.ToString();
listBox1.Invoke(new Action<string>((msg) =>
{
listBox1.Items.Add(DateTime.Now + ": " + msg);
}), client);

Thread thr = new Thread(ReceiveCkientMsg);
thr.IsBackground = true;
thr.Start(ClientSocket);
}
catch (Exception ex)
{
listenThread.Abort(ex.Message);
}
}
}

[小海贼]

用窗体的，form的invoke