c# AutoMapper踩坑

CreateMap<TestEntity, TestDto>();

public void Test1()
        {
            List<Detail> details = new List<Detail>
            {
                new Detail
                {
                    Id=1,
                    Name="唱"
                },
                 new Detail
                {
                    Id=1,
                    Name="跳"
                },
                  new Detail
                {
                    Id=1,
                    Name="rap"
                },
                   new Detail
                {
                    Id=1,
                    Name="篮球"
                },
            };

            TestEntity test = new TestEntity
            {
                Id = 1,
                Name = "小明",
                Introduce = JsonConvert.SerializeObject(details)
            };
            var config = new MapperConfiguration(cfg =>
            {
                cfg.CreateMap<TestEntity, TestDto>();
                // 表示源类型命名规则
                cfg.SourceMemberNamingConvention = new PascalCaseNamingConvention();
                //表示目标类型命名规则
                cfg.DestinationMemberNamingConvention = new LowerUnderscoreNamingConvention();
                //LowerUnderscoreNamingConvention 和 PascalCaseNamingConvention 是 AutoMapper 提供的两个命名规则。前者命名是小写并包含下划线，后者就是帕斯卡命名规则（每个单词的首字母大写）。
            });
            var result = config.CreateMapper().Map<TestDto>(test);
        }
        public class TestEntity
        {
            public int Id { get; set; }
            public string Name { get; set; }
            public string Introduce { get; set; }
        }
        public class TestDto
        {
            public int Id { get; set; }
            public string Name { get; set; }
            public List<Detail> Introduce { get; set; }

        }
        public class Detail
        {
            public int Id { get; set; }
            public string Name { get; set; }
        }