c#1_2.xaml

 <Application x:Class="TicTacToe.App"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:local="clr-namespace:TicTacToe"
              StartupUri="MainWindow.xaml">
  
     <Application.Resources>
          
     </Application.Resources>
 </Application>