ICommandDispatcherTryGetHandlerTCommand - метод

[CanBeNullAttribute]
Func<TCommand, CancellationToken, Task> TryGetHandler<TCommand>()
where TCommand : IRoutedCommand

<CanBeNullAttribute>
Function TryGetHandler(Of TCommand As IRoutedCommand) As Func(Of TCommand, CancellationToken, Task)

[CanBeNullAttribute]
generic<typename TCommand>
where TCommand : IRoutedCommand
Func<TCommand, CancellationToken, Task^>^ TryGetHandler()

[<CanBeNullAttribute>]
abstract TryGetHandler : unit -> Func<'TCommand, CancellationToken, Task>  when 'TCommand : IRoutedCommand