public static IQueryable<T2> Apply<T1, T2>(
	this IQueryable<T1> source,
	Expression<Func<IEnumerable<T1>, IEnumerable<T2>>> applyFunc
)

<ExtensionAttribute> 
Public Shared Function Apply(Of T1, T2) ( 
	source As IQueryable(Of T1),
	applyFunc As Expression(Of Func(Of IEnumerable(Of T1), IEnumerable(Of T2)))
) As IQueryable(Of T2)

public:
[ExtensionAttribute]
generic<typename T1, typename T2>
static IQueryable<T2>^ Apply(
	IQueryable<T1>^ source, 
	Expression<Func<IEnumerable<T1>^, IEnumerable<T2>^>^>^ applyFunc
)