private void mixServerClick(object sender, RoutedEventArgs e)
 {
     if (mixServerp == null)
     {
         MixServerPage p = new MixServerPage();
         mixServerp = p;
     }
     content.Content = mixServerp;
     CurrentControl  = content;
 }
        private void mixServerClick(object sender, RoutedEventArgs e)
        {
            MixServerPage p = new MixServerPage();

            content.Content = p;
        }