using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public class Item 

    {

        public Item(int id, string name) => 

            (Id, Name) = (id, name);

        public int Id { get; private set; }

        public string Name { get; private set; }

    }

    public static void Main()

    {

        new List<Item>()

        {

            new Item(1,"A"),

            new Item(1,"A"),

            new Item(2,"B")

        }

        .Distinct()

        //.DistinctBy(x => x.Id)

        .ToList()

        .ForEach(i => Console.WriteLine($"Id={i.Id}, Name={i.Name}"));

    }

}