Is it possible to have a custom type within a custom type and have the result returned via WCF RIA services? I have the following two classes below, but I can't gain access to the Verticies property within the Polygon class. I assume it is because it is a custom class, or something to do with it being a List collection.

Polygon Class

  public class Polygon
        {
            public Polygon()
            {
                _vertices = new List<Location>();
            }

            private int _id;
            [Key]
            public int Id
            {
                get;
                set;
            }

            private List<Location> _vertices;
            public List<Location> Vertices
            {
                get
                {
                    return _vertices;
                }
                set
                {
                    _vertices = value;
                }
            }
        }

Location Class

public class Location
{
    public Location()
    {

    }
    /// <summary>
    /// Default constructor for creating a Location object
    /// </summary>
    /// <param name="latitude"></param>
    /// <param name="longitude"></param>
    public Location( double latitude, double longitude )
    {
        _latitude = latitude;
        _longitude = longitude;
    }

    private int _id;
    [Key]
    public int Id
    {
        get
        {
            return _id;
        }
        set
        {
            _id = value;
        }
    }

    private double _latitude;
    /// <summary>
    /// Latitude coordinate of the location
    /// </summary>
    public double Latitude
    {
        get
        {
            return _latitude;
        }
        set
        {
            _latitude = value;
        }
    }

    private double _longitude;
    /// <summary>
    /// Longitude coordiante of the location
    /// </summary>
    public double Longitude
    {
        get
        {
            return _longitude;
        }
        set
        {
            _longitude = value;
        }
    }
}