private void MainMenu()
        {
            do
            {
                ui.ShowMainMenu();
                int input = ui.AskForInteger("");
                switch (input)
                {
                case 1:
                    if (CheckGarageIsFull())
                    {
                        break;
                    }
                    AddVehicle();
                    break;

                case 2:
                    RemoveVehicle();
                    break;

                case 3:
                    GetVehiclesNumbers();
                    break;

                case 4:
                    PrintAll();
                    break;

                case 5:
                    Seed();
                    break;

                case 6:
                    FindVehicleByRegNr();
                    break;

                case 7:
                    FindVehiclesByProporties();
                    break;

                case 0:
                    Environment.Exit(0);
                    break;

                default:
                    break;
                }
            } while (true);
        }