ExtensionsFullOuterJoinTOuter, TInner, TKey, TResult - метод

public static IEnumerable<TResult> FullOuterJoin<TOuter, TInner, TKey, TResult>(
	this IEnumerable<TOuter> outer,
	IEnumerable<TInner> inner,
	Func<TOuter, TKey> outerKeySelector,
	Func<TInner, TKey> innerKeySelector,
	Func<TOuter, TInner, TResult> resultSelector,
	IEqualityComparer<TKey> comparer = null,
	TOuter outerDefault = null,
	TInner innerDefault = null
)

<ExtensionAttribute>
Public Shared Function FullOuterJoin(Of TOuter, TInner, TKey, TResult) ( 
	outer As IEnumerable(Of TOuter),
	inner As IEnumerable(Of TInner),
	outerKeySelector As Func(Of TOuter, TKey),
	innerKeySelector As Func(Of TInner, TKey),
	resultSelector As Func(Of TOuter, TInner, TResult),
	Optional comparer As IEqualityComparer(Of TKey) = Nothing,
	Optional outerDefault As TOuter = Nothing,
	Optional innerDefault As TInner = Nothing
) As IEnumerable(Of TResult)

public:
[ExtensionAttribute]
generic<typename TOuter, typename TInner, typename TKey, typename TResult>
static IEnumerable<TResult>^ FullOuterJoin(
	IEnumerable<TOuter>^ outer, 
	IEnumerable<TInner>^ inner, 
	Func<TOuter, TKey>^ outerKeySelector, 
	Func<TInner, TKey>^ innerKeySelector, 
	Func<TOuter, TInner, TResult>^ resultSelector, 
	IEqualityComparer<TKey>^ comparer = nullptr, 
	TOuter outerDefault = nullptr, 
	TInner innerDefault = nullptr
)

[<ExtensionAttribute>]
static member FullOuterJoin : 
        outer : IEnumerable<'TOuter> * 
        inner : IEnumerable<'TInner> * 
        outerKeySelector : Func<'TOuter, 'TKey> * 
        innerKeySelector : Func<'TInner, 'TKey> * 
        resultSelector : Func<'TOuter, 'TInner, 'TResult> * 
        ?comparer : IEqualityComparer<'TKey> * 
        ?outerDefault : 'TOuter * 
        ?innerDefault : 'TInner 
(* Defaults:
        let _comparer = defaultArg comparer null
        let _outerDefault = defaultArg outerDefault null
        let _innerDefault = defaultArg innerDefault null
*)
-> IEnumerable<'TResult>