'Declaration Public ReadOnly Property SortDirection As Nullable(Of ListSortDirection)
public Nullable<ListSortDirection> SortDirection {get;}
A return value of null indicates that the column is not sorted.
Use the Sort method to change the sort direction for this column.
Alternatively, the SortedColumns collection can be used to change the sort direction for this column.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2