【.NET】VS 本地调试 无法加载Json文件

<system.webServer>
    <defaultDocument>
      <files>
        <clear />
        <add value="default.aspx" />
      </files>
    </defaultDocument>
    <security>
      <requestFiltering>
        <fileExtensions>
          <add fileExtension=".json" allowed="true" />
        </fileExtensions>
      </requestFiltering>
    </security>
    <staticContent>
      <mimeMap fileExtension=".json" mimeType="text/json" />
    </staticContent>
</system.webServer>