internal static void ImportCategoriesProducts() { int[] products = jsonService.GetProductsIds(); int[] categories = jsonService.GetCategoriesIds(); List <CategoryProduct> categoriesProducts = new List <CategoryProduct>(); for (int index = 0; index < products.Length; index++) { HashSet <int> categoryIndexes = new HashSet <int>(); for (int count = 0; count < 3; count++) { categoryIndexes.Add(random.Next(0, categories.Length)); } foreach (var integer in categoryIndexes) { int productID = products[index]; int categoryID = categories[integer]; categoriesProducts.Add(new CategoryProduct(categoryID, productID)); } } jsonService.AddCategoriesProductsRange(categoriesProducts); }