C# - IIS7: .net 4.0 Applikationen ermöglichen

/// <summary>
///   Enable the web extension to .net 4.0 framework.
/// </summary>
public void Enable40WebExtension()
{
  //enable .net 4.0 processing at isapi/cgi settings in IIS 7
  using (var serverManager = new ServerManager())
  {
    var config = serverManager.GetApplicationHostConfiguration();
    var sections = config.GetSection("system.webServer/security/isapiCgiRestriction");
    var items = sections.GetCollection();
    var configurationElement = items.FirstOrDefault(item => item.Attributes["groupId"].Value.ToString() == "ASP.NET v4.0.30319");
    if (configurationElement != null)
      configurationElement.SetAttributeValue("allowed", true);
    serverManager.CommitChanges();
  }
}