private void ChatButton_Click(object sender, RoutedEventArgs e)
 {
     if (TShockChatWindowInstance == null)
     {
         TShockChatWindowInstance = new TShockChatWindow();
         TShockChatWindowInstance.Closed += TShockChatWindowInstance_Closed;
     }
     TShockChatWindowInstance.Show();
     TShockChatWindowInstance.Activate();
 }
 private void TShockChatWindowInstance_Closed(object sender, EventArgs e)
 {
     TShockChatWindowInstance = null;
 }