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 options = new DomainOptions();
options.FriendlyName = "My Domain";
options.VoiceUrl = "https://demo.twilio.com/welcome";
options.AuthType = "IP_ACL";
options.DomainName = "marlo.sip.twilio.com";
var domain = twilio.CreateDomain(options);
Console.WriteLine(domain.Sid);
}