IIS Express的web.config中的错误页面？

<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<configuration>
    <system.webServer>
        <defaultDocument>
            <files>
                <clear />
                <add value=\"index.php\" />
                <add value=\"index.html\" />
                <add value=\"index.htm\" />
            </files>
        </defaultDocument>
    </system.webServer>
    <system.data>
        <DbProviderFactories>
            <remove invariant=\"System.Data.SqlServerCe.4.0\" />
            <add invariant=\"System.Data.SqlServerCe.4.0\" name=\"Microsoft® SQL Server® Compact 4.0\" description=\".NET Framework Data Provider for Microsoft SQL Server Compact\" type=\"System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91\" />
        </DbProviderFactories>
    </system.data>
</configuration>