实体框架

Question

当我播种数据库时，我正在观察奇怪的行为。我有三个班： User，Skill和SkillSet，我将其用作模型来创建表明以下内容的关系：

1 User有1 SkillSet

1 SkillSet可以包含多个Skills。

在我的种子方法中，当我需要在表格中填写技能组与用户ID的关系时，我称之为：

        Skill Skill1 = new Skill  { Name = "Programming", "C++" };
        Skill Skill2 = new Skill  { Name = "Programming", "Java"};
        Skill Skill3 = new Skill  { Name = "Programming", "PHP"};
        Skill Skill4 = new Skill  { Name = "Programming", "Javascript" };

        context.Skills.AddOrUpdate(Skill1,Skill2,Skill3,Skill4);

        SkillSet SkillSet1 = new SkillSet();
        SkillSet1.UserId = 1;
        SkillSet1.Skills.Add(Skill1);
        SkillSet1.Skills.Add(Skill2);

        SkillSet SkillSet2 = new SkillSet();
        SkillSet2.UserId = 2;
        SkillSet2.Skills.Add(Skill2);
        SkillSet2.Skills.Add(Skill3);

        SkillSet SkillSet3 = new SkillSet();
        SkillSet3.UserId = 3;
        SkillSet3.Skills.Add(Skill1);
        SkillSet3.Skills.Add(Skill4);

        context.SkillSets.AddOrUpdate(SkillSet1, SkillSet2,SkillSet3);

以下是Skill和SkillSet类

的代码

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

    [Required]
    public string Name { get; set; }

    //Platform
    public string TechnologyName { get; set; }
}

public class SkillSet
{
    public SkillSet()
    {
        Skills = new List<Skill>();
    }
    public int Id { get; set; }

    [Required]
    public int UserId { get; set; }

    [Required]
    public virtual ICollection<Skill> Skills { get; set; }
}

问题是我更新数据库并调用种子方法后， SkillSet和User之间的关系表看起来非常奇怪，并且反转了Id＆＃39; s。 这是一个截图：

有人可以解释为什么ID会被倒置吗？