[ADD] add closing method

Client/Views/GameWindow.xaml

@@ -6,6 +6,7 @@
         xmlns:local="clr-namespace:Client.Views"
         xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
         mc:Ignorable="d"
+        Closing="Window_Closing"
         Title="Scrubl.io" Height="600" Width="1200">
     <Grid>
         <Grid.RowDefinitions>

Client/Views/GameWindow.xaml.cs

@@ -58,5 +58,10 @@ namespace Client.Views
         {
             viewModel.Color_Picker(e, this);
         }
+
+        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
+        {
+
+        }
     }
 }