自定义asp.net2.0权限提供程序SqlMembershipProvider

        //////////////////////////////////////////////////////////////////////
        //////////////////////////////////////////////////////////////////////
        //////////////////////////////////////////////////////////////////////

        public override void UpdateUser(MembershipUser user)
        {
            if( user == null )
            {
                throw new ArgumentNullException( "user" );
            }

            string temp = user.UserName;
            SecUtility.CheckParameter( ref temp, true, true, true, 256, "UserName" );
            temp = user.Email;
            SecUtility.CheckParameter( ref temp,
                                       RequiresUniqueEmail,
                                       RequiresUniqueEmail,
                                       false,
                                       256,
                   &nb