Forms Authenication

/*
 *  Located in Global.asax.cs
 */

protected void Application_AuthenticateRequest(Object sender, EventArgs e)
{
        var userData

        if (HttpContext.Current.User == null) return;
        if (!HttpContext.Current.User.Identity.IsAuthenticated) return;
        var id = HttpContext.Current.User.Identity as FormsIdentity;
        if (id == null) return;

        FormsAuthenticationTicket ticket = id.Ticket;
        string userData = ticket.UserData;
        string[] roles = userData.Split(',');
        HttpContext.Current.User = new GenericPrincipal(id, roles);
}

/*
 *  Located in an accessible extension class
 */

public static bool BuildCookie(this Userprofile userprofile, bool remember = true)
{
    try
    {
        var roles = "A comma delimited string of roles";

        FormsAuthentication.Initialize();
        var ticket = new FormsAuthenticationTicket(1,
            userprofile.UserprofileID.ToString(),
            DateTime.Now,
            DateTime.Now.AddDays(90),
            remember,
            roles,
            FormsAuthentication.FormsCookiePath);

        var hashedTicket = FormsAuthentication.Encrypt(ticket);
        var cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hashedTicket);
        if (ticket.IsPersistent) cookie.Expires = ticket.Expiration;
        HttpContext.Current.Response.Cookies.Add(cookie);
        return true;
    } catch (Exception)
    {
        return false;
    }
}