处理类：
public string ToString(UserGiftCardModel model)
{
if (model == null) return "";
string sb = "";
Type type =model.GetType() ;//assembly.GetType("Reflect_test.PurchaseOrderHeadManageModel", true, true); //命名空间名称 + 类名
//创建类的实例
//object obj = Activator.CreateInstance(type, true);
//获取公共属性
PropertyInfo[] Propertys = type.GetProperties();