using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var mountains = new[]{new Mountain("Mountain1", 3000), new Mountain("Mountain2", 2000), new Mountain("Mountain3", 6500), };

        var ordered = mountains.OrderByDescending(x => x.Height).ToArray();

        for (int i = 0; i < ordered.Length; i++)

        {

            Console.WriteLine(ordered[i].Name);

        }

    }

}

​

public class Mountain

{

    public Mountain(string name, int height)

    {

        Name = name;

        Height = height;

    }

​

    public string Name { get; set; }

​

    public int Height { get; set; }

}