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 credentialLists = twilio.ListCredentialLists(null, null); foreach (var credentialList in credentialLists.CredentialLists) { Console.WriteLine(credentialList.FriendlyName); } }