解决步骤：

1.web.config中

<configuration>
  <configSections>
    ...
    <section name="rewriter" requirePermission="false" type="Intelligencia.UrlRewriter.Configuration.RewriterConfigurationSectionHandler, Intelligencia.UrlRewriter" /><!--加入此行-->
  </configSections>
　...
  <system.web>    <httpModules>      <add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule, Intelligencia.UrlRewriter" /><!--加入此行-->        </httpModules>
  ...
　</system.web>
  ...
  <system.webServer>
    
    <validation validateIntegratedModeConfiguration="false" />
    <modules runAllManagedModulesForAllRequests="true"><!--加入此行-->
    </modules>
  ...

</configuration>

2. App_Start/RouteConfig.cs文件中　　

    public class RouteConfig    {        public static void RegisterRoutes(RouteCollection routes)        {            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");            routes.IgnoreRoute("{resource}.apk");// 加入此行                ...         }      }

android从IIS/asp.net下载apk文件