System.Net.AuthenticationState.PreAuthIfNeeded C# (CSharp) Method

        internal void PreAuthIfNeeded(HttpWebRequest httpWebRequest, ICredentials authInfo) {
            //
            // attempt to do preauth, if needed
            //
            GlobalLog.Print("AuthenticationState#" + ValidationHelper.HashString(this) + "::PreAuthIfNeeded() TriedPreAuth:" + TriedPreAuth.ToString() + " authInfo:" + ValidationHelper.HashString(authInfo));
            if (!TriedPreAuth) {
                TriedPreAuth = true;
                if (authInfo!=null) {
                    PrepareState(httpWebRequest);
                    Authorization preauth = null;
                    try {
                        preauth = AuthenticationManager.PreAuthenticate(httpWebRequest, authInfo);
                        GlobalLog.Print("AuthenticationState#" + ValidationHelper.HashString(this) + "::PreAuthIfNeeded() preauth:" + ValidationHelper.HashString(preauth));
                        if (preauth!=null && preauth.Message!=null) {
                            GlobalLog.Print("AuthenticationState#" + ValidationHelper.HashString(this) + "::PreAuthIfNeeded() setting TriedPreAuth to Complete:" + preauth.Complete.ToString());
                            UniqueGroupId = preauth.ConnectionGroupId;
                            httpWebRequest.Headers.Set(AuthorizationHeader, preauth.Message);
                        }
                    }
                    catch (Exception exception) {
                        GlobalLog.Print("AuthenticationState#" + ValidationHelper.HashString(this) + "::PreAuthIfNeeded() PreAuthenticate() returned exception:" + exception.Message);
                        ClearSession(httpWebRequest);
                    }
                    catch {
                        GlobalLog.Print("AuthenticationState#" + ValidationHelper.HashString(this) + "::PreAuthIfNeeded() PreAuthenticate() returned exception: Non-CLS Compliant Exception");
                        ClearSession(httpWebRequest);
                    }
                }
            }
        }