尝试这个：
public class Team{ public int TeamId { get; set;} public string Name { get; set; } public virtual ICollection<Match> HomeMatches { get; set; } public virtual ICollection<Match> AwayMatches { get; set; }}public class Match{ public int MatchId { get; set; } public int HomeTeamId { get; set; } public int GuestTeamId { get; set; } public float HomePoints { get; set; } public float GuestPoints { get; set; } public DateTime Date { get; set; } public virtual Team HomeTeam { get; set; } public virtual Team GuestTeam { get; set; }}public class Context : DbContext{ ... protected override void onModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Entity<Match>() .HasRequired(m => m.HomeTeam) .WithMany(t => t.HomeMatches) .HasForeignKey(m => m.HomeTeamId) .WillCascadeonDelete(false); modelBuilder.Entity<Match>() .HasRequired(m => m.GuestTeam) .WithMany(t => t.AwayMatches) .HasForeignKey(m => m.GuestTeamId) .WillCascadeonDelete(false); }}默认情况下，主键是映射的。球队必须有两场比赛。您不能有两个FK引用的单个集合。匹配映射没有级联删除，因为在这些自引用多对多中不起作用。
