using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var users = new User[]

        {

            new User{name = "Pepe", age=40},

            new User{name = "Carlos", age=28},

            new User{name = "Gabriel", age=30},

            new User{name = "Mike", age=23},

        };

        //Uso común.

        //var usersByAge = users.OrderBy(user => user.age);

        //Shuffle.

        var rnd = new Random();

        var usersByAge = users.OrderBy(_ => rnd.Next());

        foreach(var user in usersByAge)

        {

            Console.WriteLine(user);

        }

    }

}

​

public class User

{

    public string name;

    public int age;

    override public string ToString()

    {

        return $"[Name: {name} - Age: {age}]";

    }

}