LINQ to Entities和创建实体的新实例

I am trying to create a new instance of a Customer entity in our application, and I am having a few problems. This entity has several navigational properties, each of which has their own nav. properties. For example, each Customer entity has an Address entity, and each Address entity has a Phone Number entity etc. I haven't figured out how to get the new data set for all of those entities. I've tried the following:I am trying to create a new instance of a Custo