namespace System.Net { public class AuthenticationManager { public static ICredentialPolicy CredentialPolicy { get; set; } public static StringDictionary CustomTargetNameDictionary { get; } public static IEnumerator RegisteredModules { get; } public static Authorization Authenticate(string challenge, WebRequest request, ICredentials credentials); public static Authorization PreAuthenticate(WebRequest request, ICredentials credentials); public static void Register(IAuthenticationModule authenticationModule); public static void Unregister(IAuthenticationModule authenticationModule); public static void Unregister(string authenticationScheme); } }