//--and IoC/Dependency injection framework should inject this in public SitemapGenerationWithSitemapIndexExample( ISitemapGenerator sitemapGenerator, ISitemapIndexGenerator sitemapIndexGenerator, IWebsiteUrlRetriever websiteUrlRetriever) { _sitemapGenerator = sitemapGenerator; _sitemapIndexGenerator = sitemapIndexGenerator; _websiteUrlRetriever = websiteUrlRetriever; }