public static IEnumerable<TSource> Distinct<TSource, TResult>(
	this IEnumerable<TSource> source,
	Func<TSource, TResult> selector
)

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

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

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