GenericExtensionsWithTContext, TResult - метод

[CanBeNullAttribute]
public static TResult With<TContext, TResult>(
	[CanBeNullAttribute] this TContext callSite,
	[NotNullAttribute] Func<TContext, TResult> selector
)
where TContext : class

<ExtensionAttribute>
<CanBeNullAttribute>
Public Shared Function With(Of TContext As Class, TResult) ( 
	<CanBeNullAttribute> callSite As TContext,
	<NotNullAttribute> selector As Func(Of TContext, TResult)
) As TResult

public:
[ExtensionAttribute]
[CanBeNullAttribute]
generic<typename TContext, typename TResult>
where TContext : ref class
static TResult With(
	[CanBeNullAttribute] TContext callSite, 
	[NotNullAttribute] Func<TContext, TResult>^ selector
)

[<ExtensionAttribute>]
[<CanBeNullAttribute>]
static member With : 
        [<CanBeNullAttribute>] callSite : 'TContext * 
        [<NotNullAttribute>] selector : Func<'TContext, 'TResult> -> 'TResult  when 'TContext : not struct