/// <summary>        /// 复制实体的值类型        /// </summary>        /// <typeparam name="T">实体类</typeparam>        /// <param name="obj">实体对象</param>        /// <returns></returns>        public static T GetActualEntity<T>(T obj)        {            T result = System.Activator.CreateInstance<T>();//实例化一个T            PropertyInfo[] propertyOld = obj.GetType().GetProperties();            PropertyInfo[] propertyNew = result.GetType().GetProperties();            //将实体对象的每一个值赋值给T            for (int i = 0; i < propertyOld.Length; i++)            {                propertyNew[i].SetValue(result, propertyOld[i].GetValue(obj, null), null);            }            return result;        }