你好，
你可以通过配置requestFilter 来enable vbhtml 和 cshtml.
<system.webServer>
<security>
<requestFiltering>
<fileExtensions>
<remove fileExtension=".cshtml" />
<remove fileExtension=".vbhtml"/>
<add fileExtension=".vbhtml" allowed="true"/>
<add fileExtension=".cshtml" allowed="true" />
</fileExtensions>
</requestFiltering>
</security>
</system.webServer>
详细信息你可以参考这个文档：
http://www.asp.net/web-pages/overview/more-resources/aspnet-web-pages-(razor)-troubleshooting-guide
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