<ExtensionAttribute()>
Public Shared Function GroupJoin
    (Of TOuter,TInner,TKey,TResult)( _
   ByVal outer As IEntityQuery(Of TOuter), _
   ByVal inner As IEnumerable(Of TInner), _
   ByVal outerKeySelector As Expression(Of Func(Of TOuter,TKey)), _
   ByVal innerKeySelector As Expression(Of Func(Of TInner,TKey)), _
   ByVal resultSelector As Expression(Of Func(Of TOuter,IEnumerable(Of TInner),TResult)) _
) As IEntityQuery(Of TResult)

Dim outer As IEntityQuery(Of TOuter)
Dim inner As IEnumerable(Of TInner)
Dim outerKeySelector As Expression(Of Func(Of TOuter,TKey))
Dim innerKeySelector As Expression(Of Func(Of TInner,TKey))
Dim resultSelector As Expression(Of Func(Of TOuter,IEnumerable(Of TInner),TResult))
Dim value As IEntityQuery(Of TResult)
 
value = EntityQueryExtensions.GroupJoin(Of TOuter, TInner, TKey, TResult)(outer, inner, outerKeySelector, innerKeySelector, resultSelector)

[ExtensionAttribute()]
public static IEntityQuery<TResult> GroupJoin<TOuter,TInner,TKey,TResult>( 
   IEntityQuery<TOuter> outer,
   IEnumerable<TInner> inner,
   Expression<Func<TOuter,TKey>> outerKeySelector,
   Expression<Func<TInner,TKey>> innerKeySelector,
   Expression<Func<TOuter,IEnumerable<TInner>,TResult>> resultSelector
)

[ExtensionAttribute()]
public:
static IEntityQuery<TResult^>^ GroupJoingeneric<typename TOuter>
generic<typename TInner>
generic<typename TKey>
generic<typename TResult>
( 
   IEntityQuery<TOuter^>^ outer,
   IEnumerable<TInner^>^ inner,
   Expression<Func<TOuter^,TKey^>^>^ outerKeySelector,
   Expression<Func<TInner^,TKey^>^>^ innerKeySelector,
   Expression<Func<TOuter^,IEnumerable<TInner^>^,TResult^>^>^ resultSelector
)