<ExtensionAttribute()>
Public Overloads Shared Function Select
    (Of TSource,TResult)( _
   ByVal source As IEntityQuery(Of TSource), _
   ByVal selector As Expression(Of Func(Of TSource,TResult)) _
) As IEntityQuery(Of TResult)

Dim source As IEntityQuery(Of TSource)
Dim selector As Expression(Of Func(Of TSource,TResult))
Dim value As IEntityQuery(Of TResult)
 
value = EntityQueryExtensions.Select(Of TSource, TResult)(source, selector)

[ExtensionAttribute()]
public static IEntityQuery<TResult> Select<TSource,TResult>( 
   IEntityQuery<TSource> source,
   Expression<Func<TSource,TResult>> selector
)

[ExtensionAttribute()]
public:
static IEntityQuery<TResult^>^ Selectgeneric<typename TSource>
generic<typename TResult>
( 
   IEntityQuery<TSource^>^ source,
   Expression<Func<TSource^,TResult^>^>^ selector
) 

var mgr = new DomainModelEntityManager();
var query = mgr.OrderSummaries.Where(o => o.ShipCountry == "UK").Select(o => new { o.Id, o.ShipCountry, o.OrderDate });
var list = query.ToList();