public interface IHasImages { string GetProviderId(); } public class Product : IHasImages { public string Name { get; set; } public ListIn this example, we have defined a Product class that implements the IHasImages interface and returns a static provider ID. We then create a new instance of the Product class and call the GetProviderId method to retrieve the provider ID. The package library that may contain this interface could be a generic library for working with products or with images in general.ImageUrls { get; set; } public string GetProviderId() { return "ACME123"; } } Product product = new Product { Name = "Widget", ImageUrls = new List { "https://example.com/widget1.jpg", "https://example.com/widget2.jpg" } }; string providerId = product.GetProviderId();