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
)