Adding webpart to a page using webpart file name

Scenario:
Adding webpart to a page using webpart file name

Code:

 public static void AddWebPartUsingFileName(SPWeb web, string pageName, string dwpFileName, string zoneID)
       {
           string errorMessage;

           using (SPSite site = web.Site)
           {
               using (SPWeb rootWeb = site.RootWeb)
               {
                   string url = rootWeb.Url + "/_catalogs/wp/" + dwpFileName;
                   XmlTextReader reader = new XmlTextReader(new StringReader(rootWeb.GetFileAsString(url)));
                   SPLimitedWebPartManager wpMgr = web.GetLimitedWebPartManager(pageName, PersonalizationScope.Shared);
                   WebPart webPart = (WebPart)wpMgr.ImportWebPart(reader, out errorMessage);
                   wpMgr.AddWebPart(webPart, zoneID, 1);
                   wpMgr.Web.Dispose();
               }
           }
       }

Download :
This method is also a part of SPCore now ( http://spcore.codeplex.com )