Question

I’m learning MVVM in a course from Brian Lagunas in PluralSight.

At the beginning, he was writting this two interfaces:

public interface IView
{
    IViewModel ViewModel {get;set;}
}

public interface IViewModel
{
    IView View {get;set;}
}

I was learning in that mode, and then he removed ViewModel from IView.

public interface IView {}

But I can’t see the difference of it, perhaps there’s advantages and disadvantages of it.
Is anything wrong if I put the first example?

Answer 1

This is of course to less context to leave any useful statements, but at first sight the interface

public interface IViewModel 
{
    IView View {get;set;}
}

seems very confusing for me because the main idea of the MVVM pattern is that the ViewModel is totally unaware of the View. If you equip the ViewModel with a reference to the View your are violating this idea.