Comment afficher des messages d'erreur de validation sur une page ASP.NET MVC?

Je suis assez nouveau à ASP.NET et C # J'ai passé la journée à apprendre les bases du fournisseur d'adhésion ASP.NET J'ai construit tout mon validateur mais que vous soyez coincé à la sortie de mon message d'erreur sur la page.

private void LogCreateUserError(MembershipCreateStatus status, string username)
{
    string reasonText = status.ToString();

    switch (status)
    {
        case MembershipCreateStatus.DuplicateEmail:
        case MembershipCreateStatus.DuplicateProviderUserKey:
        case MembershipCreateStatus.DuplicateUserName:

            reasonText = "The user details you entered are already registered.";
            break;

        case MembershipCreateStatus.InvalidAnswer:
        case MembershipCreateStatus.InvalidEmail:
        case MembershipCreateStatus.InvalidProviderUserKey:
        case MembershipCreateStatus.InvalidQuestion:
        case MembershipCreateStatus.InvalidUserName:
        case MembershipCreateStatus.InvalidPassword:

            reasonText = string.Format("The {0} provided was invalid.", status.ToString().Substring(7));
            break;
        default:
            reasonText = "Due to an unknown problem, we were not able to register you at this time";
            break;

    }

   //CODE TO WRITE reasonText TO THE HTML PAGE ??

}