/// <summary>
        /// C#统计List<T>字符串属性长度（返回每个属性的最大长度）
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static List<PropertyMaxLengthInfo> GetStringPropertyMaxLengths<T>(List<T> list)
        {
            var result = new List<PropertyMaxLengthInfo>();

            if (list == null || list.Count == 0)
            {
                return result;
            }

            Type type = typeof(T);

            // 获取所有string类型的公共属性
            PropertyInfo[] stringProperties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance)
                                               .Where(p => p.PropertyType == typeof(string))
                                               .ToArray();

            foreach (var prop in stringProperties)
            {
                int maxLength = 0;

                foreach (var item in list)
                {
                    string value = (string)prop.GetValue(item);
                    int currentLength = value?.Length ?? 0;

                    if (currentLength > maxLength)
                    {
                        maxLength = currentLength;
                    }
                }

                result.Add(new PropertyMaxLengthInfo
                {
                    FieldName = prop.Name,
                    MaxLength = maxLength
                });
            }

            return result;
        }

 public class PropertyMaxLengthInfo
 {
     public string FieldName { get; set; }
     public int MaxLength { get; set; }
 }