How to Handle PrincipalPermission SecurityAccessDeniedexception in wcf

See more:

WCF

We are using Role based authentication in WCF service like
Admin method:

[PrincipalPermission(SecurityAction.Demand, Role = "Admin")]
       public List<DataModels.BookStatus> ListOfBooks(DataModels.PortalsList PortalsList, DateTime StartDateTime, DateTime EndDateTime, bool BookPublishedStatus, string Username)
       {
           try
           {
               objBookList = objListOfBooks.GetListOfBooks(PortalsList, StartDateTime, EndDateTime, BookPublishedStatus, Username);
               return objBookList;
           }
           catch (SecurityAccessDeniedException)
           {
               throw new FaultException("You can't access admin methods.");
           }
       }

When User accessing this method,Its throwing unhandled SecurityAccessDeniedException. Unable to throw fault exception with "You can't access admin methods" message.

How to handle SecurityAccessDeniedException in my service.

Thanks