c#3_8.cs

private void Button_Click(object sender, EventArgs e)
 {
     var button = (Button)sender;
     int column = Grid.GetColumn(button);
     int row = Grid.GetRow(button);
     if (FieldIsLegal(column, row))
      {
         MarkField(button, column, row);
         var playerWon = CheckForWinner();
         if (playerWon)
         {
             GameInformation.Content = $"{GetCurrentSymbol()} hat gewonnen!";
             gameActive = false;
         }
         else if (fieldsMarked >= FIELD_SIZE * FIELD_SIZE)
         {
             GameInformation.Content = "Unentschieden!";
             gameActive = false;
         }
         else
         {
             SwitchPlayer();
             GameInformation.Content = $"{GetCurrentSymbol()} ist am Zug";
         }
      }
 }