我在web.config中存储了以下SMTP详细信息
<system.net>
<mailSettings>
<smtp from="isds@ixtent.com">
<network host="mail.domain.com" port="25" userName="username" password="password" defaultCredentials="true"/>
</smtp>
</mailSettings>
</system.net>
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如何从ac#class中检索这些值.