public static TSource MaxBy<TSource, TKey>(
	this IEnumerable<TSource> source,
	Func<TSource, TKey> selector
)

<ExtensionAttribute>
Public Shared Function MaxBy(Of TSource, TKey) ( 
	source As IEnumerable(Of TSource),
	selector As Func(Of TSource, TKey)
) As TSource

public:
[ExtensionAttribute]
generic<typename TSource, typename TKey>
static TSource MaxBy(
	IEnumerable<TSource>^ source, 
	Func<TSource, TKey>^ selector
)

[<ExtensionAttribute>]
static member MaxBy : 
        source : IEnumerable<'TSource> * 
        selector : Func<'TSource, 'TKey> -> 'TSource