public void Save(Model.Project entity)
        {
            using (_entities = new GreenovaEntities())
            {
                if (entity.Id == 0)
                {
                    EFRepository.Project dbEntry = new EFRepository.Project
                    {                        
                        code = entity.Code,
                        name = entity.Name,
                        remarks = entity.Remarks,
                        budget = entity.Budget
                    };

                    _entities.Projects.AddObject(dbEntry);
                }
                else
                {
                    EFRepository.Project dbEntry = _entities.Projects.Where(x => x.id == entity.Id)
                        .SingleOrDefault();

                    if (dbEntry != null)
                    {
                        dbEntry.name = entity.Name;
                        dbEntry.code = entity.Code;
                        dbEntry.remarks = entity.Remarks;
                        dbEntry.budget = entity.Budget;
                    }
                }

                _entities.SaveChanges();
            }
        }
        public void Save(Model.Person entity)
        {
            using (_entities = new GreenovaEntities())
            {
                if (entity.Id == 0)
                {
                    EFRepository.Person dbEntry = new EFRepository.Person
                    {
                        id = entity.Id,
                        first_name = entity.FirstName,
                        last_name = entity.LastName,
                        username = entity.Username,
                        password = entity.Password
                    };

                    _entities.Persons.AddObject(dbEntry);
                }
                else
                {
                    EFRepository.Person dbEntry = _entities.Persons.Where(x => x.id == entity.Id)
                        .SingleOrDefault();

                    if (dbEntry != null)
                    {
                        dbEntry.first_name = entity.FirstName;
                        dbEntry.last_name = entity.LastName;
                        dbEntry.username = entity.Username;
                        dbEntry.password = entity.Password;
                    }
                }

                _entities.SaveChanges();
            }
        }