public bool DeleteEmployee(DtoEmployee emp)
        {
            Entities_Visit ctx     = new Entities_Visit();
            bool           bResult = false;

            using (ctx = new Entities_Visit())
            {
                try
                {
                    var query = ctx.PR_UPADTE_STATE_EMPLOYEE
                                (
                        emp.iEmp_id, emp.sEmp_document
                                );
                    string result = query.ToString();

                    bResult = true;
                }
                catch (Exception e)
                {
                    bResult = false;
                }
            }
            return(bResult);
        }