SortDescriptors in GridView have mixed item types

[David]

Not all of the items in SortDescriptors of my GridView are of type  ColumnSortDescriptor . Some are of type SortDescriptor, which has no Column property. It appears that these columns are the ones that  I specified SortingState . Only the columns where I specified sorting through the UI get ColumnSortDescriptor 
I'm trying use Persistence for my grid. How can I tell what column the sort descriptors is for when It is just a SortDescriptor and not a ColumnSortDescriptor?

[Rossen Hristov]

Hello,

The SortDescriptor has a Member property which is the name of the property it sorts on.

Regards,
Rossen Hristov
Telerik

[David]

Ok, I guess I can assume that the sort path will be unique among the columns. It sure complicates things with mixed member types.