UIExtensionsInvokeNullableDeferredWithExceptionCheckAsyncTEventArgs - метод

<ExtensionAttribute>
Public Shared Function InvokeNullableDeferredWithExceptionCheckAsync(Of TEventArgs As DeferredEventArgs) ( 
	handler As EventHandler(Of TEventArgs),
	sender As Object,
	e As TEventArgs,
	Optional showMessageBox As Boolean = true,
	Optional continueOnCapturedContext As Boolean = true,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Boolean)

public:
[ExtensionAttribute]
generic<typename TEventArgs>
where TEventArgs : DeferredEventArgs
static Task<bool>^ InvokeNullableDeferredWithExceptionCheckAsync(
	EventHandler<TEventArgs>^ handler, 
	Object^ sender, 
	TEventArgs e, 
	bool showMessageBox = true, 
	bool continueOnCapturedContext = true, 
	CancellationToken cancellationToken = CancellationToken()
)

[<ExtensionAttribute>]
static member InvokeNullableDeferredWithExceptionCheckAsync : 
        handler : EventHandler<'TEventArgs> * 
        sender : Object * 
        e : 'TEventArgs * 
        ?showMessageBox : bool * 
        ?continueOnCapturedContext : bool * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _showMessageBox = defaultArg showMessageBox true
        let _continueOnCapturedContext = defaultArg continueOnCapturedContext true
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<bool>  when 'TEventArgs : DeferredEventArgs