Question

So I have a List collection that I fetch via a API call (which I don’t have any control over).

The list is ordered.

public class Article 
{
     int articleID;
     string Url
}

So I have a Url value, using that I want to figure out the next and previous Url’s if any.

What’s the most elegant way of doing this?

Answer 1

Since your list is of type Article…

var foundIndex = articles.FindIndex(a => a.Url == "myUrl");
var previousUrl = (foundIndex > 0 ? articles[foundIndex - 1].Url : null);
var  nextUrl = (foundIndex < articles.Count-1 ? articles[foundIndex + 1].Url : null);