C#: RIA Services, EF and Partial Methods

RiaPartialMethods.cs

using System.ServiceModel.DomainServices.Client;
using GalaSoft.MvvmLight.Messaging;

namespace My.Entities
{
    using My.Entities.Extensions;
    using My.Silverlight.Models;

    public sealed partial class MyEntity : Entity
    {
        partial void OnCreated()
        {
            var message = new LightNotificationMessageAction<string>("MyEntity",
                s =>
                {
                    this.SetDefaultValues(s);
                })
            {
                Source = LightMessageSource.Model,
                UniqueId = "Entity"
            };
            Messenger.Default.Send(message);
        }
    }
}