ReactiveCommand.Create method that takes an Action<object>

[distantcam]

With C# 6 coming there's some nice syntax saving to be made with ViewModels.

public ICommand MyObservableCommand => ReactiveCommand.CreateAsyncObservable(MyObservableMethod);
public ICommand MyTaskCommand => ReactiveCommand.CreateAsyncTask(MyTaskMethod);

It would be nice if it was also possible to do this with commands that just take an Action<object> as well.

public ICommand MyCommand => ReactiveCommand.Create(MyMethod);

[kentcb]

This seems dangerous to me, since every access to the property would be creating a new command instance. If I have this ctor code in my VM:

this.MyCommand
    .Subscribe(DoSomeOtherThingWhenTheCommandIsExecuted);

And I have this in my view:

this.BindCommand(ViewModel, x => x.MyCommand, x => x.someButton);

It won't work as expected. The binding infrastructure will obtain a different instance than that used in my VM's ctor.

[distantcam]

@kentcb Ack! That's true. I took the optimization a step too far and should have left it at this.

public ICommand MyCommand { get; } = ReactiveCommand.Create(MyMethod);

[kentcb]

Well, waddaya know. #971 does exactly this by requiring execution logic be provided as creation time. It will be merged shortly.