private void checkSudokuButton_Click(object sender, RoutedEventArgs e)
{
string sudoku = sudokuTextBox.Text;
if (sudoku == "test")
{
sudoku = exampleSudoku;
}
checker = new Checker(sudoku);
outputTextBlock.Text = checker.FormatSudoku();
Solver solver = new Solver(sudoku);
outputTextBlock.Text = String.Join(",", solver.GetEmptyPlacesPerSquare());
}
