Q: EF Core: Foreign key returns null value I'm trying to access a foreign key (owner) in xamarin forms, but it only returns null. According to many other questions here at stack it seems that I have to use lazy loading or Eager loading to get data from foreign key.
As lazy loading is not implemented in Core yet, I have tried to use Eager Loading instead, but I still get the null value both in xamarin forms and on backend.
My Model:
public class Building
{
    public int Id { get; set; }
    public string BuildingName { get; set; }
    public string Address { get; set; }
    public int BuildingYear { get; set; }
    public bool BuildingBool { get; set; }
    public ApplicationUser Owner { get; set; }
}

My Repository:
public IEnumerable<Building> GetAll()
{
    return _context.buildings.Include(b => b.Owner).ToList();
}

My Controller:
 public IEnumerable<Building> Get(Building value)
 {
     return _BuildingRepository.GetAll();
 }

My DbContext:
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
            : base(options)
    {
    }

    public DbSet<Building> buildings { get; set; }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
    }
}

This is how the data looks like in the database:

Do I need something else than the Include(b => b.Owner) in my repository to get it to work?

A: I don't see foreign key property in your Building model, only navigation property.
I think you should include:
public int OwnerId { get; set; }

in Building class.
