private void StartTwoPlayerBTN_Click(object sender, RoutedEventArgs e)
 {
     if ((string.IsNullOrEmpty(PlayerOneInput.Text)) || (string.IsNullOrEmpty(PlayerTwoInput.Text)))
     {
         MessageBox.Show("U bent vergeten alle namen in te vullen!");
     }
     else
     {
         TwoPlayerGame TwoPlayerGame = new TwoPlayerGame(PlayerOneInput.Text, PlayerTwoInput.Text);
         this.NavigationService.Navigate(TwoPlayerGame);
     }
 }
 public MemoryGrid(Grid grid, int cols, int rows, Highscore hs, bool OnePlayerGameBool, TwoPlayerGame tpg)
 {
     this.tpg = tpg;
     this.initClass(grid, cols, rows, hs, OnePlayerGameBool);
 }