Why can't I open a custom web.config file in my web ASP app?

Question

I can't open a web.config file in my ASP web project.

I can add config files in my project for set the authorization pages.

I need to open these pages to be able to update the "Roles" names from my admin page.

After following the sample from Microsoft, it should be working normally:

http://msdn.microsoft.com/en-us/library/vstudio/4c2kcht0(v=vs.100).aspx

Here is the C# code I use :

//Open the web.config custom
Configuration config  = WebConfigurationManager.OpenWebConfiguration("~/WebAuthorizationPilotageGeneral") as Configuration;

//Get the authorization section

// section is always == NULL !!!!

-> section = (System.Web.Configuration.AuthorizationSection)config.GetSection("authorization");

//Remove all Roles before add news Roles
section.Rules.Clear();
autho = new System.Web.Configuration.AuthorizationRule(System.Web.Configuration.AuthorizationRuleAction.Allow);
foreach (string role in Roles.GetAllRoles())
{
     if (role != ttbx_RoleName.Text)
     {
          autho.Roles.Add(role);
     }
}

//Add the news Roles
section.Rules.Add(autho);
//Save the web.config custom
config.Save(ConfigurationSaveMode.Full, true);

My web.config custom file I try to load to update "authorization" section

<!-- WebAuthorizationPilotageGeneral.config - access pilotage page -->
<authorization>
  <allow roles="Administrator" />
  <allow roles="Audit" />
  <allow roles="Copil" />
  <allow roles="System" />
  <allow roles="User" />
  <allow roles="visitor" />
  <deny users="*" />
</authorization>

The weird things is after load the config file, my config object still have 22 sections, and should have only one => "authorization" , it's look like my (web.config) root file and not the (WebAuthorizationPilotageGeneral) config file.

UPDATE : I try to put my 4 config files on only one folder

Web.config file

Answer 1

In the MS examples, there is used relative config path without "~" symbol. Have you tried to remove it?

// Set the root path of the Web application that contains the
// Web.config file that you want to access.
string configPath = "/MyAppRoot";

// Get the configuration object to access the related Web.config file.
Configuration config = WebConfigurationManager.OpenWebConfiguration(configPath);