public static IEnumerable<T> Do<T>(
	this IEnumerable<T> source,
	Action<T> action
)

<ExtensionAttribute>
Public Shared Function Do(Of T) ( 
	source As IEnumerable(Of T),
	action As Action(Of T)
) As IEnumerable(Of T)

public:
[ExtensionAttribute]
generic<typename T>
static IEnumerable<T>^ Do(
	IEnumerable<T>^ source, 
	Action<T>^ action
)

[<ExtensionAttribute>]
static member Do : 
        source : IEnumerable<'T> * 
        action : Action<'T> -> IEnumerable<'T>