public static IEnumerable<TResult> ZipLongest<TFirst, TSecond, TResult>(
	this IEnumerable<TFirst> first,
	IEnumerable<TSecond> second,
	Func<TFirst, TSecond, TResult> resultSelector
)

<ExtensionAttribute>
Public Shared Function ZipLongest(Of TFirst, TSecond, TResult) ( 
	first As IEnumerable(Of TFirst),
	second As IEnumerable(Of TSecond),
	resultSelector As Func(Of TFirst, TSecond, TResult)
) As IEnumerable(Of TResult)

public:
[ExtensionAttribute]
generic<typename TFirst, typename TSecond, typename TResult>
static IEnumerable<TResult>^ ZipLongest(
	IEnumerable<TFirst>^ first, 
	IEnumerable<TSecond>^ second, 
	Func<TFirst, TSecond, TResult>^ resultSelector
)

[<ExtensionAttribute>]
static member ZipLongest : 
        first : IEnumerable<'TFirst> * 
        second : IEnumerable<'TSecond> * 
        resultSelector : Func<'TFirst, 'TSecond, 'TResult> -> IEnumerable<'TResult> 

int[] numbers = { 1, 2, 3 };
string[] letters = { "A", "B", "C", "D" };
var zipped = numbers.EquiZip(letters, (n, l) => n + l);