Specifies whether the column has a sibling column displayed on its right. This is a dependency property.
true if the column has a sibling column displayed on its right; otherwise, false.
A View can display fixed (anchored to the left or right edge) and scrollable columns. When fixed, columns are not horizontally scrolled with a View, and are separated from other columns by a vertical line. A scrollable column and a fixed column are not sibling columns. Columns fixed to different edges are also not sibling columns.
The HasRightSibling and GridColumnHeaderBase.HasLeftSibling properties indicate whether a column has sibling columns displayed on its right and left. These properties are used by the grid to determine whether it is required to paint a column header's right/left edge.