//evenement a faire sur les bouton
private void BtnAjouterCommunication_Click(object sender, RoutedEventArgs e)
{
AjouterCommunicationVue ajoutVue = new AjouterCommunicationVue(User);
ajoutVue.Show();
this.Close();
}
private void BtnAjouterCommunication_Click(object sender, RoutedEventArgs e)
{
this.Visibility = System.Windows.Visibility.Hidden;
AjouterCommunicationVue com = new AjouterCommunicationVue(User);
com.Show();
this.Close();
}