static void Main(string[] args)
    {
        // Find your Account Sid and Auth Token at twilio.com/user/account
        string AccountSid = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
        string AuthToken = "your_auth_token";
        var twilio = new TwilioRestClient(AccountSid, AuthToken);

        var dependentNumbers = twilio.ListDependentPhoneNumbers("AD2a0747eba6abf96b7e3c3ff0b4530f6e");

        foreach (var number in dependentNumbers.DependentPhoneNumbers)
        {
          Console.WriteLine(number.FriendlyName);
        }
    }