Question

There are a few posts on the site about how to order by using lambda expressions however I cannot seem to get mine to work. I am trying to reorder a list that is already populated. Am i wrong in thinking that i can rearrange the order of this list using lambada expressions?

QuarterMileTimes.OrderByDescending(c => c.PquartermileTime); 

I was wondering if it’s down to PquartermileTime being a string? I also tried this expression on a date

QuarterMileTimes.orderBy(c => c.RaceDay);

Still no luck where am I going wrong?

Answer 1

When you call OrderByDescending, the method returns a new IEnumerable<T> – it does not reorder the collection in place.

Try doing:

QuarterMileTimes = QuarterMileTimes.OrderByDescending(c => c.PquartermileTime).ToList();

(This is if your collection is a List<T>…)