Windows.UI.Xaml.Controls.Grid.GetColumn C# (CSharp) Method

		public static extern int GetColumn([In] FrameworkElement element);
		public static extern void SetColumn([In] FrameworkElement element, [In] int value);

        private (IDisposable Subscription, Memory <ViewPosition> Views) GetPositions(int numberOfColumns, int numberOfRows)
        {
            var refs = Children.SelectToArray(c => (View: c, Handle: GCHandle.Alloc(c, GCHandleType.Normal)));

            return(
                Disposable.Create(() => refs.ForEach(c => c.Handle.Free())),
                refs
                .SelectToMemory(c =>
            {
                return MapViewToGridPosition(c);
            })
                );

            ViewPosition MapViewToGridPosition((View View, GCHandle Handle) c)
            {
                var column     = Grid.GetColumn(c.View);
                var columnSpan = Grid.GetColumnSpan(c.View);

                if (column == 0)
                {
                    // Ok: nothing to check
                }
                else if (column < 0)
                {
                    column = 0;
                }
                else if (column >= numberOfColumns)
                {
                    column = numberOfColumns - 1;
                }

                if (columnSpan == 1)
                {
                    // Ok: nothing to check
                }
                else if (columnSpan < 1)
                {
                    columnSpan = 1;
                }
                else if (column + columnSpan > numberOfColumns)
                {
                    columnSpan = numberOfColumns - column;
                }

                var row     = Grid.GetRow(c.View);
                var rowSpan = Grid.GetRowSpan(c.View);

                if (row == 0)
                {
                    // Ok: nothing to check
                }
                else if (row < 0)
                {
                    row = 0;
                }
                else if (row >= numberOfRows)
                {
                    row = numberOfRows - 1;
                }

                if (rowSpan == 1)
                {
                    // Ok: nothing to check
                }
                else if (rowSpan < 1)
                {
                    rowSpan = 1;
                }
                else if (row + rowSpan > numberOfRows)
                {
                    rowSpan = numberOfRows - row;
                }

                return(new ViewPosition(
                           c.Handle,
                           new GridPosition(
                               column,
                               row,
                               columnSpan,
                               rowSpan
                               )
                           ));
            }
        }