Assume this class:

public partial class Library : EntityObject
    {
         public Library Parent
        {
            get { return new Library();}
         }
    }

As you may guess given the EntityObject inheritance the really thing is more complex, generated by the EDMX builder and cannot be modified. I'd like it to implement an Interface:

public interface ITreeview
    {
        ITreeview Parent { get; }
    }

But (I suppose expectedly) adding this won't compile:

public partial class Library : ITreeview
    {
    }

Is there anyway of achieving what I want ?