public List <string> GetMedicineNamesAndStockQuantities()
        {
            var medicinesInStock = MedicineService.GetAllMedicinesInStock();

            var results = new List <string>(medicinesInStock.Count);

            foreach (var medicine in medicinesInStock)
            {
                results.Add($@"{medicine.Name} - {medicine.Quantity}");
            }

            return(results);
        }