我無法設置IIS認證編程方式使用C＃

此代碼拋出異常，在底部我找遍所寫的，我無法找到答案如何解決這個問題：

using (ServerManager serverManager = new ServerManager()) 
{ 
    Configuration configapp = serverManager.GetApplicationHostConfiguration(); 
    ConfigurationSection anonymousAuthenticationSection = configapp.GetSection("system.webServer/security/authentication/anonymousAuthentication", Site1); 
    anonymousAuthenticationSection["enabled"] = false; 

    serverManager.CommitChanges(); 
}

例外：

System.IO.FileNotFoundException: Filename: \\?\C:\Windows\system32\inetsrv\config\applicationHost.config 
Error: Unrecognized configuration path 'MACHINE/WEBROOT/APPHOST/Site1' 
    at Microsoft.Web.Administration.Interop.AppHostWritableAdminManager.GetAdminSection(String bstrSectionName, String bstrSectionPath) 
    at Microsoft.Web.Administration.Configuration.GetSectionInternal(ConfigurationSection section, String sectionPath, String locationPath) 
    at Microsoft.Web.Administration.Configuration.GetSection(String sectionPath, String locationPath) 
    at FlowSuiteWebConfigurator.label.button1_Click(Object sender, EventArgs e) in C:\Users\Administrator\documents\visual studio 2010\Projects\Projectname\Projectname\Form1.cs:line 264

有人能指導我如何解決這一問題？

來源

2012-08-30 user1593455

看到你有C＃的標籤，我猜這是ASP.NET文件applicationHost.config。如果您想拒絕任何未通過身份驗證的用戶，最好在實際網站的web.config中執行此操作。這應該拒絕未經授權的用戶訪問您的網站。 – seekerOfKnowledge

我實際上使用c＃作爲IIS web配置器的形式。我想首先禁用匿名登錄programaticaly，然後只應用「Windows認證」 – user1593455