Best practice MVVM navigation using Master Detail page?

Hi to all.

I want to follow the MVVM pattern as much as possible, but I don't know if I am doing the navigation quite well. Note that I am using a MasterDetail page and I want to maintain the Master page, changing only the Detail side when I navigate.

Here is the way I navigate from my ViewModel. In this example, from ViewModelOne to ViewModelTwo:

public class ViewModelOne : ViewModelBase
{
    private void GoToViewTwo()
    {
        var viewTwo = new ViewTwo(new ViewModelTwo());
        ((MasterView)Application.Current.MainPage).NavigateToPage(viewTwo);
    }
}

MasterView implementation:

public class MasterView : MasterDetailPage
{
    public void NavigateToPage(Page page)
    {
        Detail = new NavigationPage(page);
        IsPresented = false;
    }
}

ViewTwo implementation:

public partial class ViewTwo : PageBase
{
    public MenuView(ViewModelTwo vm)
        : base(vm)
    {
        InitializeComponent();
    }
}

PageBase implementation:

public class PageBase : ContentPage
{
    public PageBase(ViewModelBase vmb)
    {
        this.BindingContext = vmb;
    }
}

Is this the best approach (and best performance) for do the navigation? When I do some navigations, the app starts to run slower and maybe there is something I am not doing fine.
Is this the best approach for do the navigation showing always a MasterDetail page?

Thanks.