Visual Studio 2012：Intellisense无法用于<ext标签

Question

=“”

Visual Studio 2012 intellisense无法用于标记代码，<ext tags它仅显示html tags条推荐。 我怎样才能使其正常工作？

web.config中的

ext.net设置

<configuration>   
       <configSections>

        <section name="extnet" type="Ext.Net.GlobalConfig" requirePermission="false" />    </configSections>       <system.webServer>
        <modules runAllManagedModulesForAllRequests="true">
          <add name="DirectRequestModule" preCondition="managedHandler" type="Ext.Net.DirectRequestModule, Ext.Net" />
        </modules>
        <validation validateIntegratedModeConfiguration="false" />
        <handlers>
          <add name="DirectRequestHandler" verb="*" path="*/ext.axd" preCondition="integratedMode" type="Ext.Net.ResourceHandler" />
        </handlers>   
     </system.webServer>
<pages>
  <namespaces>
    <add namespace="System.Web.Optimization" />
    <add namespace="Ext.Net" />
  </namespaces>
  <controls>
    <add assembly="Microsoft.AspNet.Web.Optimization.WebForms" namespace="Microsoft.AspNet.Web.Optimization.WebForms" tagPrefix="webopt" />
    <add assembly="Ext.Net" namespace="Ext.Net" tagPrefix="ext" />
  </controls>
</pages>