static async Task SendSms() { var accountSid = "ACba92b39902bc361138fea39fee0a41b7"; // Your Account SID from twilio.com/console var authToken = "{{ auth_token }}"; // Your Auth Token from twilio.com/console TwilioClient.init(accountSid, authToken); var restClient = new TwilioRestClient(accountSid, authToken); var message = await new MessageCreator( new PhoneNumber("+12345678901"), // To number accountSid, "Hello from C#" ).CreateAsync(restClient); Console.WriteLine(message.GetSid()); }