1.http://www.cnblogs.com/libingql/archive/2013/01/31/2888201.html

2.多对多

protected override void OnModelCreating(DbModelBuilder modelBuilder)

{

//多对多

Database.SetInitializer<CmsDbContext>(null);

modelBuilder.Entity<Article>()

.HasMany(e => e.Tags)

.WithMany(e => e.Articles)

.Map(m =>

{

m.ToTable("ArticleTag");

m.MapLeftKey("ArticleId");

m.MapRightKey("TagId");

});

base.OnModelCreating(modelBuilder);

}