how to receive SMS from twilio in mvc5 C#

namespace BackendWebService.Controllers
{
    public class TRRController : TwilioController
    {
        [HttpPost]
        public TwiMLResult ReceiveSMS(SmsRequest twilioRequest)
        {
            var twilioResponse = new TwilioResponse();
            return TwiML(twilioResponse.Message("Thank's For Textting .....")); 
        }
        [HttpPost]
        public TwiMLResult ReceiveCall(TwilioRequest twilioRequest)
        {
            var twilioResponse = new TwilioResponse();
            var t = TwiML(twilioResponse.Reject("rejected"));
            return t;
        }    
    }
}