The code below returns an error:
A value of type 'PropertySortDescriptor' cannot be added to a collection or dictionary of type 'SortDescriptorCollection'.
<telerik:RadDataGrid.SortDescriptors>
<telerik:PropertySortDescriptor PropertyName="PracticeLogId" SortOrder="Descending" />
</telerik:RadDataGrid.SortDescriptors>
?