I use ColumnGroupDescriptor to group the GrieView
<telerik:RadGridView.GroupDescriptors>
<telerik:ColumnGroupDescriptor x:Name="columnGroupDescriptor" Column="{Binding Columns[\ContactTitleWithConverter\], ElementName=ESColumnGrid}" SortDirection="Descending"/>
</telerik:RadGridView.GroupDescriptors>
the group sort is according to the binding field Ascending or Descending
but my group is constant for example a,b,c
Is any way to manual sort the group for example as b c a