Question

I have got code something like

IEnumerable<TwitterStatus> mentions = service.ListTweetsOnHomeTimeline();
RecentTweetList.ItemsSource = mentions;

What I want to do is to add somehow to TwitterStatus 1 extra attribute to convert CreatedDate of that class to get minutes. (I cannot redesign TwitterStatus.)

So I guessed to do like:

public class NewTwitterStatus : TwitterStatus
{
        public string MinAgo 
        {
            get 
            {
                TimeSpan diff = DateTime.Now.Subtract(base.CreatedDate);
                return diff.Minutes.ToString() + "m";
            }
        }
}

But I cannot figure out how to do the cast?

IEnumerable<NewTwitterStatus > mentions = (????)service.ListTweetsOnHomeTimeline();

---

Thank you all of you guys!

THE SOLUTION (based on Chris’ suggestion):

IEnumerable<NewTwitterStatus> mentions = service.ListTweetsOnHomeTimeline().Select(x => new NewTwitterStatus(x));
RecentTweetList.ItemsSource = mentions;



 public class NewTwitterStatus
    {
        TwitterStatus Data { set; get; }

        public NewTwitterStatus(TwitterStatus ts)
        {
            Data = ts;
            ts = null;
        }

        public string ProfileImageUrl
        {
            get
            {
                return Data.User.ProfileImageUrl;
            }
        }


        public string ScreenName
        {
            get
            {
                return Data.User.ScreenName;
            }
        }

        public string UserName
        {
            get
            {
                return Data.User.Name;
            }
        }

        public string Text
        {
            get
            {                
                return Data.Text;
            }
        }

        public string MinAgo 
        {
            get 
            {
                TimeSpan diff = DateTime.Now.Subtract(Data.CreatedDate);
                int mins = diff.Minutes * -1;

                if (mins < 60)
                    return mins.ToString() + "m";
                else  
                {
                    double h = mins / 60;
                    double m = mins % 60;
                    return h.ToString()  + "h " + m.ToString() + "m";
                }


            }
        }

Answer 1

If you can’t do an extension method then I would make your NewTwitterStatus class have a constructor that takes a TwitterStatus to allow easy conversion and then use some linq like the following:

IEnumerable<NewTwitterStatus > mentions = 
    service.ListTweetsOnHomeTimeline().Select(x=> new NewTwitterStatus(x));

This will basically take the original IEnumberable and map the elements into the new type. Its a bit less elegant than an extension method but should do the trick.