public static IEnumerable<T> Concat<T>(
	this T head,
	IEnumerable<T> tail
)

<ExtensionAttribute>
Public Shared Function Concat(Of T) ( 
	head As T,
	tail As IEnumerable(Of T)
) As IEnumerable(Of T)

public:
[ExtensionAttribute]
generic<typename T>
static IEnumerable<T>^ Concat(
	T head, 
	IEnumerable<T>^ tail
)

[<ExtensionAttribute>]
static member Concat : 
        head : 'T * 
        tail : IEnumerable<'T> -> IEnumerable<'T>