MongoDB学习笔记~数据模型属性为集合时应该为它初始化

        public class Dog : NoSqlEntity
        {
            public Dog()
            {
                this.AddressHistory = new List<Adderss>();
                this.DogHistory = new List<DogHistory>();
                this.Foods = new string[] { };
            }
            public Des Des { get; set; }
            public string Title { get; set; }
            public string Type { get; set; }
            public string[] Foods { get; set; }
            public List<DogHistory> DogHistory { get; set; }
            public List<Adderss> AddressHistory { get; set; }
        }