using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var libelles = new List<string>{"Lib1","Lib2","Lib3","Lib4"};

        var valeurs = new List<int>{10,20,30};

        var elements = libelles.Zip(valeurs, (l,v)=>new Element{ Libelle=l, Valeur=v});

        elements.ToList().ForEach(el=>Console.WriteLine(el.ToString()));

​

    }

    public class Element{

        public string Libelle{get;set;}

        public int Valeur {get;set;}

        public override string ToString()

        {

            return string.Format("{0}={1}",Libelle,Valeur);         

        }

    }

}