Boilerplate Code Encapsulation. Reactive Property. See: https://medium.com/@worldbeater/reactive-mvvm-for-net-platform-175dc69cfc82

ReactivePropertyViewModel.cs

public class ReactivePropertyViewModel
{
    public ReadOnlyReactiveProperty<string> Greeting { get; }
    public ReactiveProperty<string> Name { get; }
    public ReactiveCommand Clear { get; }

    public ReactivePropertyViewModel()
    {
        Clear = new ReactiveCommand();
        Clear.Subscribe(() => Name.Value = string.Empty);

        Name = new ReactiveProperty<string>(string.Empty);
        Greeting = Name
            .Select(name => $"Hello, {name}!")
            .ToReadOnlyReactiveProperty();
    }
}