SourceGrid.Range.GetCellsPositions C# (CSharp) Method

        public PositionCollection GetCellsPositions()
        {
            PositionCollection l_List = new PositionCollection();
            for (int r = Start.Row; r <= End.Row; r++)
                for (int c = Start.Column; c <= End.Column; c++)
                    l_List.Add(new Position(r,c));

            return l_List;
        }

        /// <summary>
        /// Indicates if the specified range of cells is selected
        /// </summary>
        /// <param name="p_Range"></param>
        /// <returns></returns>
        public virtual bool Contains(Range p_Range)
        {
            if (p_Range.IsEmpty() || IsEmpty())
            {
                return(false);
            }

            if (p_Range.ColumnsCount == 1 && p_Range.RowsCount == 1)
            {
                return(Contains(p_Range.Start));
            }

            //Range
            for (int i = 0; i < m_RangeCollection.Count; i++)
            {
                if (m_RangeCollection[i].Contains(p_Range))
                {
                    return(true);
                }
            }

            PositionCollection positions = p_Range.GetCellsPositions();

            for (int iPos = 0; iPos < positions.Count; iPos++)
            {
                if (Contains(positions[iPos]) == false)
                {
                    return(false);
                }
            }
            return(true);
        }