SourceGrid.GridVirtual.RangeToSize C# (CSharp) Method

        public Size RangeToSize(Range range)
        {
            if (range.IsEmpty())
                return Size.Empty;

            int width = 0;
            for (int c = range.Start.Column; c <= range.End.Column; c++)
                width += Columns.GetWidth(c);

            int height = 0;
            for (int r = range.Start.Row; r <= range.End.Row; r++)
                height += Rows.GetHeight(r);

            return new Size(width, height);
        }