public static void AddNewNutrition(NutritionData item, string typeString) { TypeFood type = (TypeFood)Enum.Parse(typeof(TypeFood), typeString); switch (type) { case TypeFood.Meat: meat.AddNewNutrution(item); break; case TypeFood.Fruit: fruit.AddNewNutrution(item); break; case TypeFood.Nuts: nuts.AddNewNutrution(item); break; case TypeFood.Vegetables: vegetables.AddNewNutrution(item); break; case TypeFood.Fish: fish.AddNewNutrution(item); break; case TypeFood.Cereals: cereals.AddNewNutrution(item); break; case TypeFood.Bread: bread.AddNewNutrution(item); break; case TypeFood.Alchohol: alchohol.AddNewNutrution(item); break; case TypeFood.SoftDrinks: softDrinks.AddNewNutrution(item); break; } }