//calling and handling sudoku generator
public void GenerateSudoku(string difficulty)
{
gridHandler.ClearGrid();
generator = new SudokuGenerator(gridHandler);
sudoku = generator.GenerateNewSudoku(difficulty);
printer.PrintSudokuInGrid(sudoku);
}
/// <summary>
/// Generates new Sudoku array
/// </summary>
public void GenerateSolution()
{
this.Solution = SudokuGenerator.Generate(this).Solution;
}