c# - Persisting an object using Entity Framework 6.1.2 that includes an interface -

i having difficulty persisting objects sql server db using entity framework. trying following using code first methodology:

public class objecta {     public string name { get; set; }     public imyinterface interfaceobject { get; set; }     public objectd anotherobject { get; set; } }  public interface imyinterface { }  public class objectb : imyinterface {     public string somepropertyb { get; set; } }  public class objectc : imyinterface {     public string somepropertyc { get; set; } }  public class objectd {     public string somepropertyd { get; set; } } 

my application context class contains following:

    public dbset<objecta> objecta { get; set; }     public dbset<objectb> objectb { get; set; }     public dbset<objectc> objectc { get; set; }     public dbset<objectd> objectd { get; set; } 

after updating database, contains tables each of above entities. when attempt save objecta using context.savechanges(), data objecta , objectd persisted, objectb or objectc behind interfaceobject not persisted.

is attempting possible? if not, have ideas on other ways persist objecta can have 1 instance of either objectb or objectc, not both?

i solved problem making interface abstract class id field:

public interface imyinterface {         [key]         public int id { get; set; } } 

now in database, using table per hierarchy represent classes in question.