using System;

using System.Collections.Generic;

using System.Linq;

​

namespace ConsoleApplication1

{

    public class Program

    {

        public static void Main()

        {

            var rnd = new Random();

            var collection = Enumerable

                .Range(1, 100)

                .Select(_ => new Item(rnd.Next(30)))

                .ToList();

​

            var max = collection.Max(x => x.Prop);

            var filteredCollection = collection.Where(x => x.Prop == max);

​

            foreach (var item in filteredCollection)

            {

                Console.WriteLine(item.Prop);

            }

​

        }

    }

​

    public class Item

    {

        public int Prop { get; set; }

        public Item(int prop)

        {

            Prop = prop;

        }

    }

}

​