是否不可能对第二个类进行第二次引用？FirstClass 包含 SecondClasses，而 SeocondBegin 包含 begin 元素。使用此代码，我在 SaveChanges:Sy 中得到了异常...

难道不能对第二个类进行第二次引用吗？FirstClass 包含 SecondClasses，而 SeocondBegin 包含 begin 元素。使用此代码，我在 SaveChanges 中得到了异常：

System.InvalidOperationException: 'Unable to save changes because a circular dependency was detected in the data to be saved: 'FirstClass { 'Id': -2147482647 } [Added] <-
SecondClasses FirstClass { 'FirstClassId': -2147482647 } SecondClass { 'Id': -2147482647 } [Added] <-
SecondBegin { 'SecondBeginId': -2147482647 } FirstClass { 'Id': -2147482647 } [Added]'.'

我希望具有此属性，因为第二个类应该是一个“链表”，并且集合 SecondClasses 不包含源：

namespace EFTestApp
{
    public class FirstClass
    {
        public int Id { get; set; }
        public int? SecondBeginId { get; set; }
        public string Name { get; set; }
        [ForeignKey(nameof(SecondBeginId))]
        public SecondClass SecondBegin { get; set; }
        [InverseProperty(nameof(EFTestApp.SecondClass.FirstClass))]
        [IgnoreDataMember]
        public ICollection<SecondClass> SecondClasses { get; set; }
    }
}

namespace EFTestApp
{
    public class SecondClass
    {
        public int Id { get; set; }
        public int FirstClassId { get; set; }
        public string Url { get; set; }
        [ForeignKey(nameof(FirstClassId))]
        public FirstClass FirstClass { get; set; }
        public SecondClass Next { get; set; }
    }
}

namespace EFTestApp
{
    public class ApplicationDbContext : DbContext
    {
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.EnableSensitiveDataLogging();
            optionsBuilder.UseSqlServer(@"Server=(localdb)\MSSQLLocalDB;Database=sample;Trusted_Connection=True");
        }

        public DbSet<FirstClass> FirstClasses { get; set; }
        public DbSet<SecondClass> SecondClasses { get; set; }
    }
}

namespace EFTestApp
{
    class Program
    {
        static void Main(string[] args)
        {
            var dbContext = new ApplicationDbContext();
            dbContext.Database.EnsureCreated();

            var firstClass = new FirstClass()
            {
                Name = "First"
            };
            var secondClass = new SecondClass()
            {
                FirstClass = firstClass,
                Url = "Blablah"
            };
            
            firstClass.SecondBegin = secondClass;

            dbContext.Add(firstClass);
            dbContext.SaveChanges();
        }
    }
}