Preventing concurrent RelayCommand executions throughout a ViewModel

[symbiogenesis]

I make extensive use of RelayCommand and AsyncRelayCommand.

I was noticing that sometimes concurrent executions could happen in my code, not just of the same command, and I wanted to prevent that.

All my ViewModels inherit from a BaseViewModel which has a boolean IsBusy property. And my default boilerplate pattern at the moment is to wrap all of my command logic in a try-catch-finally that initially sets IsBusy to true, and then sets it to false in the finally block. Then all my canExecute routines include a check that IsBusy is false.

I later noticed that there was an option, AsyncRelayCommandOptions.AllowConcurrentExecutions. Which of course made me figure that the default behavior is not to allow them, which seems to only prevent a single command from concurrently executing. But I would like all commands to happen one at a time.

This pattern that I'm using is adequate, and it prevents this problem in a single ViewModel, but it would be kind of neat if there were a way to more concisely accomplish what I'm after, and I'm sure that it is a very common desire.

Or perhaps my entire logic is misguided