无法加载自定义成员资格提供程序

Could not load Custom Membership Provider

我已经创建了自己的自定义会员提供程序并在 web.config 中引用它如下

<membership defaultProvider="MyMembershipProvider">
  <providers>
    <clear />
    <add name="MyMembershipProvider" type="HelpDeskSupport.App_Code.MyMembershipProvider, HelpDeskSupport.App_code"
         cacheTimeoutInMinutes="30"/>
  </providers>
</membership>

然而每当我运行项目它抱怨Could not load file or assembly 'HelpDeskSupport.App_code' or one of its dependencies. The system cannot find the file specified.

我检查了根文件夹,一切都检查好了,这是文件夹结构的快照

有什么建议吗?

type 元素中的第二部分必须只是程序集名称:

type="HelpDeskSupport.App_Code.MyMembershipProvider, HelpDeskSupport"