Asp.net 从web.config引用App_代码中的代码

我想在Web.config中引用某个网站项目的App_Code文件夹中的某个类型。type属性要求我输入程序集名称。互联网让我无法为大会投入什么

具体来说,

<system.web>
    <webServices>
        <soapExtensionReflectorTypes>
            <add type="MyType, $App_Code$" />
        </soapExtensionReflectorTypes>
    </webServices>
</system.web>

---

我应该在$App_Code$中放入什么来编译它？我试过uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu。只有一个Web应用程序项目就足够了