Sort objects in List by properties on the object

Question

I have a List of objects in C#. All the objects contain properties code1 and code2 (among other properties). The list of objects is in no particular order. I need to sort the li

Answer 1

Note that Adam Houldsworth's answer with the .ToList() call needlessly creates a new list. If your list is large, this may create unacceptable memory pressure. It would most likely be better to sort the list in place by providing a custom comparison function:

theList.Sort((a, b) =>
    {
        var firstCompare = a.code1.CompareTo(b.code1);
        return firstCompare != 0 ? firstCompare : a.code2.CompareTo(b.code2);
    });

Alternatively, if this ordering is an intrinsic property of your type, you could implement IComparable on your type, and just call

theList.Sort();

... which will use the IComparable.CompareTo() implementation.