I'm using C# on Framework 3.5. I'm looking to quickly sort a Generic
List<T>. For the sake of this example, let's say I have a List of a
Person type with a property of lastname. How would I sort this List using a lambda expression?
List<Person> people = PopulateList(); people.OrderBy(???? => ?????)
If you mean an in-place sort (i.e. the list is updated):
people.Sort((x, y) => string.Compare(x.LastName, y.LastName));
If you mean a new list:
var newList = people.OrderBy(x=>x.LastName).ToList(); // ToList optional
Do you need the list to be sorted in place, or just an ordered sequence of the contents of the list? The latter is easier:
var peopleInOrder = people.OrderBy(person => person.LastName);
To sort in place, you'd need an
IComparer<Person> or a
Comparison<Person>. For that, you may wish to consider
ProjectionComparer in MiscUtil.
(I know I keep bringing MiscUtil up - it just keeps being relevant...)