public string ShowProductDocumation(string pName, string pType, string pDocumation) { if (pNameList.Contains(pName) && pTypeList.Contains(pType) && pDocumationList.Contains(pDocumation)) { if (pDocumation == "Produkt infomation") { ProductInfo pi = new ProductInfo(pName, pType); return pi.ToString(); } else if (pDocumation == "Opskirft") { Recipe r = new Recipe(pName, pType); return r.ToString(); } else if (pDocumation == "Correspondance") { } else if (pDocumation == "QualityAssurance") { } //database metode til at give data tilbage i en string } return null; }