Generate a Sitefinity CMS sitemap using the API

using Telerik.Sitefinity.Multisite;
using Telerik.Sitefinity.Services;
using Telerik.Sitefinity.SitemapGenerator;

namespace SitefinityWebApp
{
   public class GenerateSitemap
   {
       //generate a sitemap for the current site
       public void GenerateSitemanAPI()
       {
           var multisiteManager = SystemManager.CurrentContext as MultisiteContext;
           var getSiteByName = multisiteManager.GetSiteByName("sitemapTest").Id;

           //schedule sitemap to execute immediately
           SitemapManager.GenerateSitemap(getSiteByName);
       }

       //generate  sitemap for all sites from a multisite project
       public void GenerateSitemapAllSites()
       {
           var multisiteManager = SystemManager.CurrentContext as MultisiteContext;
           foreach (var site in multisiteManager.GetSites())
           {
               SitemapManager.GenerateSitemap(site.Id);
           }
       }
   }
}