Mengapa Ini Termasuk tidak berfungsi?

Saya tidak berpikir masalahnya ada pada kode yang Anda tunjukkan. Saya membuat aplikasi konsol dari apa yang Anda masukkan di atas dan menampilkan apa yang ada di database. Berikut keseluruhan aplikasinya:

namespace ExampleCF
{
    public class Foo
    {
        public int FooId { get; set; }
        public virtual List<Bar> Bars { get; set; }
    }

    public class Bar
    {
        public int BarId { get; set; }
        public virtual Foo Foo { get; set; }
        public int FooId { get; set; }
        public virtual List<Employee> Employees { get; set; }
    }

    public class Employee
    {
        public int EmployeeId { get; set; }
        public int BarId { get; set; }
        public virtual Bar Bar { get; set; }
        public int BankId { get; set; }
        public virtual Bank Bank { get; set; }
        public int PositionId { get; set; }
        public virtual Position Position { get; set; }
        public string Name { get; set; }
    }

    public class Bank
    {
        public int BankId { get; set; }
        public string Name { get; set; }
    }

    public class Position
    {
        public int PositionId { get; set; }
        public string Name { get; set; }
    }

    public class Model : DbContext
    {
        public DbSet<Foo> Foos { get; set; }
        public DbSet<Bar> Bars { get; set; }
        public DbSet<Employee> Employees { get; set; }
        public DbSet<Bank> Banks { get; set; }
        public DbSet<Position> Positions { get; set; }

        public Model()
        {
            Configuration.LazyLoadingEnabled = false;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Model context = new Model();
            var exp = new Collection<Expression<Func<Foo, object>>>();

            Foo foo = new Foo();
            Bar bar = new Bar();
            Employee emp = new Employee() { Name = "employee" };
            Bank bank = new Bank() { Name = "bank" };
            Position position = new Position() { Name = "position" };
            foo.Bars = new List<Bar>();
            foo.Bars.Add(bar);
            bar.Employees = new List<Employee>();
            bar.Employees.Add(emp);
            emp.Position = position;
            emp.Bank = bank;
            context.Foos.Add(foo);
            context.SaveChanges();

            exp.Add(f => f.Bars.Select(b => b.Employees.Select(e => e.Position)));
            exp.Add(f => f.Bars.Select(b => b.Employees.Select(e => e.Bank)));

            DbSet<Foo> dbSet = context.Set<Foo>();
            IQueryable<Foo> query = dbSet;

            if (exp != null)
            {
                foreach (var incProp in exp)
                {
                    query = query.Include(incProp);
                }
            }

            var first = query.ToList().FirstOrDefault();
            var firstEmp = first.Bars.First().Employees.First();
            Console.WriteLine(String.Format("{0} | {1} | {2}", firstEmp.Name, firstEmp.Bank.Name, firstEmp.Position.Name));
        }
    }

}

keluaran:employee | bank |position

Apakah ada hal lain yang Anda tambahkan ke kueri, atau mungkin Anda membuat jenis anonim?