相关疑难解决方法(0)

鉴于这个非常简单的模型:

public class MyContext : BaseContext
{
    public DbSet<Foo> Foos { get; set; }
    public DbSet<Bar> Bars { get; set; }
}

public class Foo
{
    public int Id { get; set; }
    public int Data { get; set; }
    [Required]
    public virtual Bar Bar { get; set; }
}

public class Bar
{
    public int Id { get; set; }
}

以下程序失败:

object id;
using (var context = new MyContext())
{
    var foo = new Foo { Bar = …