Error Handling

Prism 9 introduced better Error Handling for all Commands including the AsyncDelegateCommand. This provides several useful opportunities for app developers.

1. Avoid needing to wrap every method in a try/catch.
2. Provide multiple handlers to provide specific logic based on the type of Exception encountered.
3. Share error handling logic across multiple commands.

new DelegateCommand(() => { })
    .Catch<NullReferenceException>(nullReferenceException => {
        // Provide specific handling for the specified Exception Type
    })
    .Catch(exception => {
        // Handle any exception thrown
    })