title: How to change the background color of button on Click Event in Universal Windows Platform Apps?
body: <p>I'm working on a UWP app in windows 10 and I am trying to change the background color of a button in a click event. This is my code:</p>
  
  <pre><code>private void button1_1_Click(object sender, RoutedEventArgs e)
  {
      if (_Sign)
      {
          button_1_1.Content = "Cross";
          _Sign = false;
      }
      else
      {
          // button_1_1.Background = new SolidColorBrush(new Windows.UI.Color )    
  
          // indows.UI.Colors clr = new Windows.UI.Colors(new SolidColorBrush red);
  
          // SolidColorBrush color = new SolidColorBrush();
          // color = new SolidColorBrush.
          // button_1_1.Background = clr;
  
          button_1_1.Content = "Tick";
          _Sign = true;
      }
  }
  </code></pre>