static void Main(string[] args) { // Find your Account Sid and Auth Token at twilio.com/user/account string AccountSid = "{{ account_sid }}"; string AuthToken = "{{ auth_token }}"; var twilio = new TwilioRestClient(AccountSid, AuthToken); var ipAddress = twilio.CreateIpAddress("AL32a3c49700934481addd5ce1659f04d2", "My office IP Address", "55.102.123.124"); Console.WriteLine(ipAddress.Sid); }