Gets or sets a value that indicates whether the list of items (after applying the sort and filters, if any) is already in the correct order for grouping.
Assembly: PresentationFramework (in PresentationFramework.dll)
Setting this property to true informs the view that the list of items is already in the correct order for grouping and allows the view to use a more efficient algorithm to build the groups. The data is in the correct order if:
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
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.