Linq et toList()

using System;
using System.Linq;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public class AdresseP 
    {
        public string Rue { get;  set; }
        public string Cp { get; set; }
        public string Ville { get; set; }

        public AdresseP(string aRue, string aCp, string aVille) 
        {
            this.Rue = aRue;
            this.Cp = aCp;
            this.Ville = aVille;
        }
 
    }
    
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        private void button1_Click(object sender, EventArgs e)
        {
            var db = new DataClasses1DataContext();
            var q = from a in db.Adresses
                    select new AdresseP(a.Rue,a.Cp,a.Ville);

            dataGridView1.DataSource = q.ToList();

        }
    }
}

 
 public partial class Adresse
    {
   
        public Adresse(string aRue, string aCp, string aVille) 
        {
            this.Rue = aRue;
            this.Cp = aCp;
            this.Ville = aVille;
        }
 
    }

 var db = new DataClasses1DataContext();
            var q = from a in db.Adresses
                    select new { a.Rue, a.Cp, a.Ville };
            dataGridView1.DataSource = q.ToList();

[OperationContract]
List<Adresse> Email();

[OperationContract]
List<Annonce> Email();