/// <summary>
        /// 通过反射把一个类的属性的值赋值给另一个类
        /// </summary>
        /// <typeparam name="D"></typeparam>
        /// <typeparam name="S"></typeparam>
        /// <param name="s"></param>
        /// <returns></returns>
        public static D Mapper<D, S>(S s)
        {
            D d = Activator.CreateInstance<D>();
            try
            {
                var sType = s.GetType();
                var dType = typeof(D);
                foreach (PropertyInfo sP in sType.GetProperties())
                {
                    foreach (PropertyInfo dP in dType.GetProperties())
                    {
                        if (dP.Name == sP.Name)
                        {
                            dP.SetValue(d, sP.GetValue(s));
                        }
                    }
                }
            }
            catch (Exception ex)
            {
            }
            return d;
        }

Mapper<User, UserInfo>(UserInfo u);