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, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.