我记得在EF 导航属性应该是虚拟的 : public class Blog { public int BlogId { get; set; } public string Name { get; set; } public string Url { get; set; } public string Tags { get; set; } public virtual ICollection Posts { get; set; } } 但我看看EF Core并不认为它是虚拟的: public class Student { public int ID { get; […]