<ExtensionAttribute()>
Public Shared Function ThenBySelector(Of TSource)( _
   ByVal source As IEntityQuery(Of TSource), _
   ByVal selector As ISortSelector _
) As IEntityQuery(Of TSource)

Dim source As IEntityQuery(Of TSource)
Dim selector As ISortSelector
Dim value As IEntityQuery(Of TSource)
 
value = EntityQueryExtensions.ThenBySelector(Of TSource)(source, selector)

[ExtensionAttribute()]
public static IEntityQuery<TSource> ThenBySelector<TSource>( 
   IEntityQuery<TSource> source,
   ISortSelector selector
)

[ExtensionAttribute()]
public:
static IEntityQuery<TSource^>^ ThenBySelectorgeneric<typename TSource>
( 
   IEntityQuery<TSource^>^ source,
   ISortSelector^ selector
) 

public void ThenBySample1() {
  var mgr = new DomainModelEntityManager();
  var selector1 = new SortSelector(typeof(Customer), "Country");
  var selector2 = new SortSelector(typeof(Customer), "CompanyName");
  var results = mgr.Customers.OrderBySelector(selector1).ThenBySelector(selector2).ToList();
}