gistfile1.cs

public class Foo
{
  [Key]
  public Int32 FooId { get; set; }
  public String Drr { get; set; }
  public ICollection<Bar> Bars { get; set; }
}

public class Bar
{
  [Key]
  public Int32 BarId { get; set; }
  public string Herp { get; set; }
  public Int32 FooId { get; set; }
  [ForeignKey("FooId")]
  public Foo Foo { get; set; }
}