Sort a List using query expressions

Question

I have a problem using Linq to order a structure like this :

public class Person
{
    public int ID { get; set; }
    public List Attribu         


        

Answer 1

This is assuming that Attribute class implement IComparable or has a nice ToString function (i hope).

var list = personList.OrderBy(p => p.Attributes.FirstOrDefault(a => a.Name == "Age"))

Otherwise the syntax gets more convoluted:

var list = personList
            .OrderBy(p => 
                     p.Attributes.FirstOrDefault(a => a.Name == "Age") == null ?
                     "" : p.Attributes.First(a => a.Name == "Age").Value
            );

I also assume that you have one value for each key - otherwise you'd need to have smarter code... ;-)