You mean something like this?

var list = new List<Person>
{
    new Person("me", 10),
    new Person("you", 5),
    new Person("dad", 30),
};

var result = list.OrderBy(x => x.Age);

foreach (var entry in result)
    Console.WriteLine(entry.Name + ": " + entry.Age);

where the Person object is defined as

class Person
{
    public string Name { get; set; }
    public int Age {get;set;}

    public Person(string name, int age)
    {
        Name = name;
        Age = age;
    }
}

this will print:

you: 5
me: 10
dad: 30