using System;

using System.Text;

using System.Linq;

using System.Collections.Generic;

​

​

public class Program

{

    public static void Main(string[] args)

    {

        var lista = new List<int>{

            2,3,5,4,6

        };

        Console.WriteLine(lista.SequenceEqual(lista.OrderBy(x => x)));

        lista = new List<int>{

            1,2,3,4,5

        };

        Console.WriteLine(lista.SequenceEqual(lista.OrderBy(x => x)));  

    }

}