Custom Property Issue

Hi All,

I am having some issues when creating a bindable property. I am working with the forms map control and I am wanting to bind Pins in MVVM(I may be going about this wrong but its worth a shot)

I have the following code.

Custom View

'public class CustomMapClass: Map
{
Position _pinPos;
public CustomMapClass () :base()
{

    }

//Custom Property
public static readonly BindableProperty PositionProperty =
BindableProperty.Create<CustomMapClass, Position>(p => p.PinPosition, default(Position));

    public Position PinPosition {
        get {
            return (Position)GetValue(PositionProperty);
        }
        set {
            SetValue (PositionProperty, value);
            base.Pins.Add(new Pin{Position = value}); //Setting the pin position
        }
    }
}

}`

ViewModel

public Position PinLocation
        {
            get{ return _pos; }
            set 
            {
                if (_pos != value) 
                {
                    _pos = value;
                    RaisePropertyChanged ("PinLocation");
                }
            }
        }

Lastly the XAML

<views:CustomMapClass PinPosition = "{Binding PinLocation}"/>

Whenever I run the code I get the following error.

"Position 180:33. Cannot assign property "PinPosition": type mismatch between "Xamarin.Forms.Binding" and "Xamarin.Forms.Maps.Position"

Am I doing something horribly wrong? I am still sorta new to MVVM.

Thanks!