SetBinding exception using Xamarin Forms - xamarin

Question

I was stuck in this exception when starting using Xamarin forms with MVVM implementation
Method not found: 'Xamarin.Forms.BindableObjectExtensions.SetBinding'.
It failed at the line var mainNav = new MainPage ()
public static Page GetMainPage ()
{
RegisterTypes ();
var mainNav = new MainPage ();
return mainNav;
}
Here is my code, I have remove the unrelated codes to keep it simple. As you can see, it is very basic, and I knew I must get something very basic wrong, but just can't figure it out.
Thanks in advance....
View
public class MainPage :ContentPage
{
public MainPage ()
{
BindingContext = new MainPageViewModel ();
var nameEntry = new Entry ();
nameEntry.SetBinding (Entry.TextProperty, "Name");
Content = new StackLayout
{
Spacing = 12,
Padding = 20,
VerticalOptions = LayoutOptions.Start,
Children = { nameEntry }
};
}
}
ViewModel
public class MainPageViewModel:BaseViewModel
{
private string _name;
public string Name
{
get
{
return _name;
}
set
{
_name = value;
OnPropertyChanged();
}
}
}

Answer 1

I tried your exact code in a new project (Xamarin 3.9) and it worked fine (I only tested Android).
I omitted the RegisterTypes() from GetMainPage() and implemented the BaseViewModel as follows:
public class BaseViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
}
Maybe you just need to update your Xamarin?