/// <summary>
        /// Model to Model
        /// </summary>
        /// <typeparam name="T">类</typeparam>
        /// <typeparam name="Tn">新的类</typeparam>
        /// <param name="objmodel">T类的参数值</param>
        /// <param name="nobjModel">Tn类一个空的实例化</param>
        /// <returns></returns>
        public static Tn ModelToModel<T, Tn>(T objmodel, Tn nobjModel)
        {
            Tn Nobjmodel = nobjModel;
            //被继承的类
            Type modelType = typeof(T);
            Type newModel = typeof(Tn);//继承后的新类
            PropertyInfo[] newpropertys = modelType.GetProperties();//列举出新的类中信息
            //循环新类的属性
            foreach (PropertyInfo pi in newpropertys)
            {
                string ParaName = pi.Name;//参数名称
                string ParamType = pi.PropertyType.Name;//字段类型 int/DateTime/string 等等
                object vaule = modelType.GetProperty(ParaName).GetValue(objmodel, null);//从被继承的类中根据相同字段名称读取类的值
                if (vaule != null) {
                    var property = newModel.GetProperty(ParaName);
                    if(property!=null)
                        property.SetValue(Nobjmodel, vaule, null);//给新版本的类参数赋值
                }
            }
            return Nobjmodel;
        }