void view_AddClientClicked(object sender, EventArgs e) { string name = view.NameClient; string lastName = view.LastNameClient; DateTime birthday = view.Birthday; string email = view.Email; string telephone = view.Telephone; if (string.IsNullOrEmpty(name) || string.IsNullOrWhiteSpace(name) || string.IsNullOrEmpty(lastName) || string.IsNullOrWhiteSpace(lastName) || string.IsNullOrEmpty(telephone) || string.IsNullOrWhiteSpace(telephone) ) { messager.ErrorMessage(string.Format("Ошибка добавления клиента!{0}{0}Необходимо заполнить обязательные поля формы помеченные символом \"*\".", Environment.NewLine )); return; } Client newClient = new Client(name, lastName, birthday, email, telephone); clientManager.AddNewClient(newClient, view.Group); view.RefreshForm(); }