/* l'authentification est associée cette section du web.config
<authentication mode="Forms">
      <forms loginUrl="index.aspx" name=".ASPXAUTH">
        <credentials passwordFormat="Clear">
          <user name="marne" password ="marne"/>
        </credentials>
      </forms>
    </authentication>
    <authorization>
      <deny users="?"/>
    </authorization>
*/
           #region authentification
            string userName = Login1.UserName;
            string pwd = Login1.Password;

            //authentification via web.config
            if (FormsAuthentication.Authenticate(userName, pwd))
            {
                FormsAuthentication.RedirectFromLoginPage(userName, false);
            }
            #endregion