public IActionResult AddSubscriber(Subscriber subscriber)
        {
            var ip_address = HttpContext.Connection.RemoteIpAddress.ToString();

            subscriber.IpAddress = ip_address;

            if (string.IsNullOrEmpty(subscriber.Name))
            {
                subscriber.Name = "NA";
            }

            if (repositoryData.IsSubscriberExist(subscriber.EmailId))
            {
                return(Json(new { success = false, message = "Emailid already subscribed." }));
            }

            repositoryData.AddSubscriber(subscriber);
            repositoryData.Commit();

            return(Json(new { success = true, message = "Thank you for subscribing us." }));

            //return new ContentResult
            //{
            //    StatusCode = 200,
            //    ContentType = "application/xml",
            //    Content = strContent,

            //};
        }