TwilioNewRelicDemo_WelcomeController.cs

public class WelcomeController : TwilioApiController
{
    public HttpResponseMessage Post(VoiceRequest request)
    {
        var response = new TwilioResponse();
        response.Say("Welcome to this Twilio demo app. Please enter your 3 digit pin code.");
        response.Gather(new { numDigits = 3, action = string.Format("/api/Authenticate") });

        return this.TwiMLResponse(response);
    }
}