public bool Delete(int Id)
        {
            PrincipalDetailsRepository principal = new PrincipalDetailsRepository();

            return(principal.Delete(Id));
        }
        public PrincipalDetails Get(int Id)
        {
            PrincipalDetailsRepository principal = new PrincipalDetailsRepository();

            return(principal.Get(Id));
        }
        public bool Put(PrincipalDetails principalDetails)
        {
            PrincipalDetailsRepository principal = new PrincipalDetailsRepository();

            return(principal.Put(principalDetails));
        }
        public List <PrincipalDetails> Get()
        {
            PrincipalDetailsRepository principal = new PrincipalDetailsRepository();

            return(principal.GetAll());
        }