using System;

using System.Linq;

​

class TextoValor

{

    public int Id {get;set;}

    public string Name {get;set;}

}

​

public class Program

{

    public static void Main()

    {

        var list = new[] {

                new TextoValor() { Id = 1, Name = "Texto1"},

                new TextoValor() { Id = 2, Name = "Texto2"},

                new TextoValor() { Id = 3, Name = "Texto3"},

                new TextoValor() { Id = 4, Name = "Texto4"},

                new TextoValor() { Id = 1, Name = "Texto5"},

                new TextoValor() { Id = 1, Name = "Texto6"},

                new TextoValor() { Id = 2, Name = "Texto7"},

        };

        foreach(var item in list.GroupBy(grouping => grouping.Id)){

            Console.WriteLine("We are trying to group by " + item.Key + ". So now let's take a look of the group items.");

            foreach(var groupItem in item){

                Console.WriteLine("The cool name is: " + groupItem.Name + " and it's id is: " + groupItem.Id);

            }

        }

    }

}