public static IEnumerable<TResult> FullGroupJoin<TFirst, TSecond, TKey, TResult>(
	this IEnumerable<TFirst> first,
	IEnumerable<TSecond> second,
	Func<TFirst, TKey> firstKeySelector,
	Func<TSecond, TKey> secondKeySelector,
	Func<TKey, IEnumerable<TFirst>, IEnumerable<TSecond>, TResult> resultSelector,
	IEqualityComparer<TKey> comparer
)

<ExtensionAttribute>
Public Shared Function FullGroupJoin(Of TFirst, TSecond, TKey, TResult) ( 
	first As IEnumerable(Of TFirst),
	second As IEnumerable(Of TSecond),
	firstKeySelector As Func(Of TFirst, TKey),
	secondKeySelector As Func(Of TSecond, TKey),
	resultSelector As Func(Of TKey, IEnumerable(Of TFirst), IEnumerable(Of TSecond), TResult),
	comparer As IEqualityComparer(Of TKey)
) As IEnumerable(Of TResult)

public:
[ExtensionAttribute]
generic<typename TFirst, typename TSecond, typename TKey, typename TResult>
static IEnumerable<TResult>^ FullGroupJoin(
	IEnumerable<TFirst>^ first, 
	IEnumerable<TSecond>^ second, 
	Func<TFirst, TKey>^ firstKeySelector, 
	Func<TSecond, TKey>^ secondKeySelector, 
	Func<TKey, IEnumerable<TFirst>^, IEnumerable<TSecond>^, TResult>^ resultSelector, 
	IEqualityComparer<TKey>^ comparer
)

[<ExtensionAttribute>]
static member FullGroupJoin : 
        first : IEnumerable<'TFirst> * 
        second : IEnumerable<'TSecond> * 
        firstKeySelector : Func<'TFirst, 'TKey> * 
        secondKeySelector : Func<'TSecond, 'TKey> * 
        resultSelector : Func<'TKey, IEnumerable<'TFirst>, IEnumerable<'TSecond>, 'TResult> * 
        comparer : IEqualityComparer<'TKey> -> IEnumerable<'TResult>