reactiveui/ReactiveUI — pull request #150 by sillyotter (2013-01-10 12:51:00+00:00)
Title: User provided initial state for ReactiveAsyncCommands

ReactiveAsyncCommands when driven by an IObservable defaults initially to reporting CanExecute as true before any events pass through the canExecute observable. This change keeps that default behavior, but allows the user to change this default to false if appropriate.