c#3_7.cs

private void MarkField(Button button, int column, int row)
 {
     button.Content = GetCurrentSymbol();
     fields[column][row] = currentPlayer;
     fieldsMarked++;
 }
 private void SwitchPlayer()
 {
     if (currentPlayer == Player.Player1)
     {
         currentPlayer = Player.Player2;
     }
     else
     {
         currentPlayer = Player.Player1;
     }
 }