Sudoku.Board.CouldPutValueInSquare C# (CSharp) Method

        private bool CouldPutValueInSquare(Columns column, Rows row, Values value)
        {
            int r = (int)row;
            int c = (int)column;
            return (
                ((_RowValues[r] & value) == 0) &&
                ((_ColumnValues[c] & value) > 0) &&
                ((_RegionValues[c / 3, r / 3] & value) == 0)
                );
        }