Sharepoint - Loop through all site collections of a webapplication

Here is the code....

try

            {

                string webapplicationUrl = "http://webapplicationURL/";

                SPWebApplication webApplication = SPWebApplication.Lookup(new Uri(webapplicationUrl));

                SPSiteCollection siteCollections = webApplication.Sites;

                foreach (SPSite siteCollection in siteCollections)

                {

                    Console.WriteLine("SiteCollection URL:" + siteCollection.Url);

                    using (SPSite oSiteCollection = new SPSite(siteCollection.Url))

                    {

                        SPWebCollection collWebsites = oSiteCollection.AllWebs;

                        foreach (SPWeb oWebsite in collWebsites)

                        {

                            Console.WriteLine("Website URL: " + oWebsite.Url);

                            oWebsite.Dispose();

                        }

                    }

                }

                Console.WriteLine("---------Program Completed Successfully. Please click enter to exit.------ ");

                Console.ReadLine();

            }

            catch (Exception e)

            {

                Console.WriteLine("ERROR:" + e.Message);

                Console.WriteLine("---------ERROR: Program terminated because of ERROR. Please click enter to exit.------ ");

                Console.ReadLine();

            }