Can I notify a class instance to make the view changed when any of it's fields has changed?

[keynes1981]

I have a Test instance, when it's fields has changed in the command, Can I notify the instance to make the view changed? I cannot use CommunityToolkit.Mvvm
public class MainWindowViewModel : ViewModelBase
{
public Test Test { get; set; }
public MainWindowViewModel()
{
Test = new Test();

    OKComand = ReactiveCommand.Create<string>((val) =>
    {
        Test.Id = 1111;
        Test.Title = "Hello World!";

        RaisePropteryChanged(nameof(Test));
    });
}
public ICommand? OKComand { get; set; }

}

public class Test
{
public int Id { get; set; } = 123;
public string Title { get; set; } = "Hello";
}

[timunie]

No, that's not working. Either you wrap your item in a helper class or replace the entire test instance afaik

[thevortexcloud]

I would argue you are not following the correct pattern here. Generally, only view models should be exposed to the view. If you need to expose a non view model, it should be wrapped by a view model. EG You might have a Car model class, and then a CarViewModel that accepts a Car in it's constructor and uses Car as a backing variable/to initialise its values. The other advantage of doing that is it lets you customise the presentation somewhat without messing up your data layer.