public void CheckIfFileExists(FileName fileName)
        {
            string path = $@"Dal\{fileName}.json";

            if (fileName == FileName.CarComponents)
            {
                if (!File.Exists(path))
                {
                    ManageStock manageStock = new ManageStock();
                    Dictionary <string, int> CarComponents = manageStock.CarComponentsDefault();

                    _ = SaveData(CarComponents, FileName.CarComponents);
                }
            }
            if (fileName == FileName.BusComponents)
            {
                if (!File.Exists(path))
                {
                    ManageStock manageStock = new ManageStock();
                    Dictionary <string, int> BusComponents = manageStock.BusComponentsDefault();

                    _ = SaveData(BusComponents, FileName.BusComponents);
                }
            }
            if (fileName == FileName.TruckComponents)
            {
                if (!File.Exists(path))
                {
                    ManageStock manageStock = new ManageStock();
                    Dictionary <string, int> TruckComponents = manageStock.TruckComponentsDefault();

                    _ = SaveData(TruckComponents, FileName.TruckComponents);
                }
            }
            if (fileName == FileName.MotorbikeComponents)
            {
                if (!File.Exists(path))
                {
                    ManageStock manageStock = new ManageStock();
                    Dictionary <string, int> MotorbikeComponents = manageStock.MotorbikeComponentsDefault();

                    _ = SaveData(MotorbikeComponents, FileName.MotorbikeComponents);
                }
            }
        }