Entity Framework Navigation Woes - entity-framework

Question

I have Business and BusinessProgram declared as:
public class Business : DbIdEntity
{
public string Name { get; set; }
public virtual Address PhysicalAddress { get; set; }
public virtual Address PostalAddress { get; set; }
public Guid OwnerKey { get; set; }
public virtual Account Owner { get; set; }
public virtual IEnumerable<BusinessProgram> BusinessPrograms { get; set; }
}
public class BusinessProgram : DbEntity<Guid>
{
public Business Business { get; set; }
public ProgramType ProgramType { get; set; }
public DateTime? EffectiveDate { get; set; }
public DateTime? ExpireDate { get; set; }
}
DbIdEntity and DbEntity are just base classes where the primary key (and an autonumbering Id field are declared.
When I query it using this query
foreach (Data.Business business in context.Businesses.Include(b => b.Owner)
.Include(b => b.PhysicalAddress)
.Include(b => b.Owner)
.Include(b => b.BusinessPrograms)
.OrderBy(b => b.Name))
I'm also using a convention that makes properties ending in "Key" the primary and foreign keys instead of the default "Id".
I get the error:
"A specified Include path is not valid. The EntityType
'Data.Business' does not declare a navigation
property with the name 'BusinessPrograms'."
What am I doing wrong?
UPDATE
I used IEnumerable instead of ICollection. Using the correct navigation property type fixed the issue.

Answer 1

I used IEnumerable for my navigation type instead of ICollection. Changing it to ICollection fixed the issue.

Answer 2

I've had rather limited success with using base classes in the way you describe. I'd try "flattening" your model first, and getting it working like that. Then you could try re-introducing the base classes; you might be able to get that working too.
Here it looks as though BusinessProgram should contain a FK property called BusinessProgram_BusinessId if you want to use the default convention. Alternatively, you could give it a different name and use an attribute to override the default convention:
[ForeignKey("Business")]
public int BusinessId { get; set;}