using System;

public class Program

{

//Mail Chimp API section

        public string GetListMember(string apiKey, string listId, string subscriberEmail = "")

        {

            System.Threading.Tasks.Task<string> task = System.Threading.Tasks.Task.Run<string>(async () => await GetListMemberWorker(apiKey, listId, subscriberEmail));

            if(task.IsFaulted)

            {

                return "error";

            }

​

            string result = "";

            try

            {

                // your code 

                result = task.Result;

            }

            catch(AggregateException e)

            {

                System.Diagnostics.Debug.WriteLine(e.InnerException.GetType().ToString());

                result = e.InnerException.Message;

            }

​

            return result;

        }

​

        public bool LookupMailchimpListIsSubscribedToLifestyle(string a_EmailAddress)

        {

​

            if(string.IsNullOrEmpty(a_EmailAddress)) { return false; }

​

            if(System.Web.HttpContext.Current.Session["HasMailingListCheckBeenPerformed"] != null && Convert.ToBoolean(System.Web.HttpContext.Current.Session["HasMailingListCheckBeenPerformed"]))

            {

                // we've already looked this up. 

                // return the cached value

                return System.Web.HttpContext.Current.Session["IsCurrentlySubscribedToMailinglist"] != null ? Convert.ToBoolean(System.Web.HttpContext.Current.Session["IsCurrentlySubscribedToMailinglist"]) : false;

            }

​

            bool MailchimpIsSubscribed = false;

            // perform setup

            string strStoreNum = "VPOLifestyle";

            string strAPIKeyConfigName = string.Format("Mailchimp.APIKey.{0}", strStoreNum);

            string strListConfigName = string.Format("Mailchimp.ListID.{0}", strStoreNum);

            string strAPIKey = AppLogic.AppConfig(strAPIKeyConfigName);

            string strListID = AppLogic.AppConfig(strListConfigName);

            MailChimp.Net.Interfaces.IMailChimpManager mailChimpManager = new MailChimp.Net.MailChimpManager(strAPIKey);

​

​

​

​

            // we haven't checked yet.  Perform the lookup

            var MailchimpAPIResult = GetListMember(strAPIKey, strListID, a_EmailAddress);

​

​

​

            if((MailchimpAPIResult.Length > 29 && MailchimpAPIResult.Substring(0, 30) == "Unable to find the resource at") || MailchimpAPIResult == Convert.ToString(System.Net.HttpStatusCode.NotFound) || MailchimpAPIResult == MailChimp.Net.Models.Status.Pending.ToString())

            {

                MailchimpIsSubscribed = false;

            }

            else if(MailchimpAPIResult == MailChimp.Net.Models.Status.Subscribed.ToString().ToLower())

            {

                MailchimpIsSubscribed = true;

            }

​

            System.Web.HttpContext.Current.Session["IsCurrentlySubscribedToMailinglist"] = MailchimpIsSubscribed;

            System.Web.HttpContext.Current.Session["HasMailingListCheckBeenPerformed"] = true;

​

            return MailchimpIsSubscribed;

​

        }

​

​

        private static async System.Threading.Tasks.Task<string> GetListMemberWorker(string apiKey, string listId, string subscriberEmail = "")

        {

            IMailChimpManager manager = new MailChimpManager(apiKey); //if you have it in code

            MailChimp.Net.Models.Member foundMember;

​

            try

            {

                foundMember = await manager.Members.GetAsync(listId, subscriberEmail);

            }

            catch(Exception ex)

            {

                throw ex;

            }

            finally { }

​

​

            return foundMember.Status.ToString().ToLower();

        }

}