private void onlineUsers_DoubleClick(object sender, EventArgs e)
        {
            String user = onlineUsers.SelectedItem.ToString();

            if (!privateWindows.Contains(user))
            {
                PrivateChat window = new PrivateChat(myIp, user, swSender);
                privateWindows.Add(user, window);
            }
            try
            {
                ((PrivateChat)privateWindows[user]).recievedMessage("");
            }
            catch
            {
                privateWindows.Remove(user);
                PrivateChat window = new PrivateChat(myIp, user, swSender);
                privateWindows.Add(user, window);
                ((PrivateChat)privateWindows[user]).Show();
            }
        }
 private void onlineUsers_DoubleClick(object sender, EventArgs e)
 {
     String user = onlineUsers.SelectedItem.ToString();
     if (!privateWindows.Contains(user))
     {
         PrivateChat window = new PrivateChat(myIp, user, swSender);
         privateWindows.Add(user, window);
     }
     try
     {
         ((PrivateChat)privateWindows[user]).recievedMessage("");
     }
     catch
     {
         privateWindows.Remove(user);
         PrivateChat window = new PrivateChat(myIp, user, swSender);
         privateWindows.Add(user, window);
         ((PrivateChat)privateWindows[user]).Show();
     }
 }