public static IEnumerable<T> FallbackIfEmpty<T>(
	this IEnumerable<T> source,
	T fallback1,
	T fallback2
)

<ExtensionAttribute>
Public Shared Function FallbackIfEmpty(Of T) ( 
	source As IEnumerable(Of T),
	fallback1 As T,
	fallback2 As T
) As IEnumerable(Of T)

public:
[ExtensionAttribute]
generic<typename T>
static IEnumerable<T>^ FallbackIfEmpty(
	IEnumerable<T>^ source, 
	T fallback1, 
	T fallback2
)

[<ExtensionAttribute>]
static member FallbackIfEmpty : 
        source : IEnumerable<'T> * 
        fallback1 : 'T * 
        fallback2 : 'T -> IEnumerable<'T>