consider the implementation below, and then:
- look for improvements
- look for mistakes
- look for design improvements
- all of the above should be the absolute simplest and most elegant possible

```csharp
    /// <summary>
    /// Runs the product migration, which migrates the product data from Bless to Shopify.
    /// </summary>
    /// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
    public async Task RunProductMigrationAsync()
    {
        // This is the store id of Melizza's store in Bless
        const int melizzasStoreId = 37255;
        // This is the list of products from Shopify
        var shopifyProducts = await this.shopifyProductService.ListAsync();
        // This is the list of products from Bless that have listings in Melizza's store
        var products = blessEcommerceContext
            .Products
            .Include(x => x.Listings.Where(y => y.StoreId == melizzasStoreId)).Where(x => x.Listings.Any())
            .ToList();

        foreach (var blessProduct in products)
        {
            var shopifyProduct = shopifyProducts
                .Items
                .SelectMany(x => x.Variants)
                .FirstOrDefault(x => x.SKU == blessProduct.Sku);
            if (shopifyProduct == null)
            {
                var newShopifyProduct = new Product();
                newShopifyProduct.Title = blessProduct.Name;
                newShopifyProduct.BodyHtml = blessProduct.Description;
                newShopifyProduct.Handle = blessProduct.Sku;
                newShopifyProduct.Vendor = "LuLaRoe";
                newShopifyProduct.ProductType = blessProduct.Description;
                
                await shopifyProductService.CreateAsync(newShopifyProduct);
            }
            else
            {
                shopifyProduct.InventoryQuantity = blessProduct.Listings.Sum(x => x.Quantity);
            }
        }
    }
``` Your answer should have exactly 3 paragraphs. Make sure that the 2nd paragraph starts with the word "offer" and that each paragraph is separated by two new lines.
user