我对EntityFramework项目中的导航属性有疑问。这是类MobileUser:[DataContract][Table("MobileUser")]publicclassMobileUser:IEquatable{//constructorsomitted....//////Theprimary-keyofMobileUser.///ThisisnottheVwdIdwhichisstoredinaseparatecolumn///[DataMember,Key,Required,DatabaseGenerated(DatabaseGeneratedOption.Identit