真的需要一些帮助...... 我正在尝试让我的MVC应用程序使用Syndication库作为我的程序的RSS提要阅读器部分，并在尝试启用迁移时遇到困难：
RssProject.Models.SyndicationPerson: : EntityType 'SyndicationPerson' has no key defined. Define the key for this EntityType.
RssProject.Models.SyndicationElementExtension: : EntityType 'SyndicationElementExtension' has no key defined. Define the key for this EntityType.
RssProject.Models.SyndicationCategory: : EntityType 'SyndicationCategory' has no key defined. Define the key for this EntityType.
RssProject.Models.SyndicationLink: : EntityType 'SyndicationLink' has no key defined. Define the key for this EntityType.
SyndicationContents: : The referenced EntitySet 'SyndicationContents' for End 'SyndicationItem_Copyright_Target' could not be found in the containing EntityContainer.
SyndicationContents: : The referenced EntitySet 'SyndicationContents' for End 'SyndicationFeed_Copyright_Target' could not be found in the containing EntityContainer.
SyndicationContents: : The referenced EntitySet 'SyndicationContents' for End 'SyndicationFeed_Description_Target' could not be found in the containing EntityContainer.
SyndicationContents: : The referenced EntitySet 'SyndicationContents' for End 'SyndicationFeed_Title_Target' could not be found in the containing EntityContainer.
SyndicationContents: : The referenced EntitySet 'SyndicationContents' for End 'SyndicationItem_Summary_Target' could not be found in the containing EntityContainer.
SyndicationContents: : The referenced EntitySet 'SyndicationContents' for End 'SyndicationItem_Title_Target' could not be found in the containing EntityContainer.
SyndicationPersons: EntityType: EntitySet 'SyndicationPersons' is based on type 'SyndicationPerson' that has no keys defined.
SyndicationElementExtensions: EntityType: EntitySet 'SyndicationElementExtensions' is based on type 'SyndicationElementExtension' that has no keys defined.
SyndicationCategories: EntityType: EntitySet 'SyndicationCategories' is based on type 'SyndicationCategory' that has no keys defined.
SyndicationLinks: EntityType: EntitySet 'SyndicationLinks' is based on type 'SyndicationLink' that has no keys defined.
SyndicationContents: EntityType: EntitySet 'SyndicationContents' is based on type 'SyndicationContent' that has no keys defined.
（我必须在联合之前添加，我使用Web客户端使用简单的feed阅读功能，但它不支持某些xml类型，所以我决定切换到联合。）
我正在集思广益，并在最近几个小时内搜索网络以找到一些帮助但没有成功。在尝试' update-database -force 之后，已经删除旧数据库并创建了新数据库strong>'结果相同。
认为它可能与实体框架有关，但它已更新到最新版本。
这是我的班级：
public class Feeds
{
[Key]
public int FeedId { get; set; }
public SyndicationItem Feed { get; set; }
public int SiteId { get; set; }
}
编辑：指出我显然使用代码优先迁移
任何帮助都将不胜感激！