private void button_Solve_Click(object sender, EventArgs e) { var timer = Stopwatch.StartNew(); SudokuSolver sudokuSolver = new SudokuSolver(Sudoku); sudokuSolver.SolveSudoku(); var log = sudokuSolver.Log; Heatmap = log.Heatmap; textBox_Log.Text = log.LogText; Text = timer.ElapsedMilliseconds + " ms"; pictureBox1.Refresh(); }