Gets or sets which columns or rows are resized relative to the column or row for which the GridSplitter control is defined.
Assembly: PresentationFramework (in PresentationFramework.dll)
To specify a GridSplitter that resizes rows or columns, set the HorizontalAlignment and VerticalAlignment properties. If you cannot achieve the desired behavior by setting the HorizontalAlignment and VerticalAlignment properties, change the ResizeDirection or default values. For more information, see How to: Resize Rows with a GridSplitter and How to: Resize Columns with a GridSplitter.
Available since 3.0