public bool IsValidSudoku(char[][] board)
{
var validator = new SudokuValidator();
for (int i = 0; i < board.Length; i++)
{
for (int j = 0; j < board[i].Length; j++)
{
if (board[i][j] == '.')
{
continue;
}
var cellValue = CharToInt(board[i][j]);
if (!validator.AddCellValueAndReturnIfValid(cellValue, i, j))
{
return(false);
}
}
}
return(true);
}