System.Data.SqlClient.SqlException：列名“Root_rootID”无效

问：

我是 ASP.NET 的新手，我正在学习 MVC 和 EF。使用“数据库中的代码优先”。ASP.NET 表中自动创建的。甚至 SQL 数据库中的表也没有列。rootIdmarriageMarriagerootId

这是表类marriage

[Table("Marriage")]
public partial class Marriage
{
    [Key]
    public int marriageID { get; set; }

    public int? spouseID { get; set; } = 0;
    public int? childID { get; set; } = 0;

    public virtual ICollection<Child> children { get; set; }

    public virtual Spouse spouse { get; set; }
}

这是我的根表类：

[Table("Root")]
public partial class Root
{
    [Key]
    public int rootID { get; set; }

    [Required]
    [StringLength(100)]
    public string name { get; set; }

    [Column("class")]
    [Required]
    [StringLength(100)]
    public string @class { get; set; }

    [Required]
    [StringLength(100)]
    public string textClass { get; set; } = "emphasis";

    public int? extraID { get; set; }
    public int? marriagesID { get; set; }

    public DateTime whenEntered { get; set; } = DateTime.UtcNow;
    public DateTime whenModified { get; set; } = DateTime.UtcNow;

    public virtual ICollection<Marriage> marriages { get; set; }

    public virtual Extra  extra  { get; set; }
}

每当我像在模型中一样调用婚姻类或将数据保存在婚姻模型中时，只需将性别化即可

Sql = "SELECT \r\n    [Extent1].[marriageID] AS [marriageID],
  [Extent1].[spouseID] AS [spouseID],
[Extent1].[childID] AS [childID], 
  [Extent1].[Root_rootID] AS [Root_rootID]
  FROM [dbo].[Marriage] AS [Extent1]"

因为不在类中，也不在数据库表中。为什么会发生此异常？我错过了什么？[Root_rootID]Marriage