/// <summary>
    /// Performs the application initialization on the first request
    /// </summary>
    private void FirstRequestInitialization(object sender, EventArgs e)
    {
        if (ApplicationInitialized)
        {
            return;
        }

        // Initialize application in a locked context
        lock (mLock)
        {
            if (ApplicationInitialized)
            {
                return;
            }

            // Remember date and time of the application start
            mApplicationStart = DateTime.Now;

            mWindowsIdentity = WindowsIdentity.GetCurrent();

            ViewModeOnDemand viewMode = new ViewModeOnDemand();

            // Log application start
            if (CMSFunctions.AnyDebugEnabled)
            {
                RequestSettings settings = RequestSettings.Current;
                bool liveSite = (viewMode.Value == ViewModeEnum.LiveSite);

                settings.DebugRequest = RequestHelper.DebugRequests && liveSite;
                RequestHelper.LogRequestOperation("BeforeApplicationStart", null, 0);

                settings.DebugSQLQueries = SqlHelperClass.DebugQueries && liveSite;
                settings.DebugCache = CacheHelper.DebugCache && liveSite;
                settings.DebugSecurity = SecurityHelper.DebugSecurity && liveSite;
                settings.DebugMacros = MacroResolver.DebugMacros && liveSite;
                settings.DebugWebFarm = WebSyncHelperClass.DebugWebFarm && liveSite;

                DebugHelper.SetContext("App_Start");
            }

            CMSApplication.BeforeAplicationStart(sender, e);
            CMSCustom.Init();

            //ConnectionHelper.UseContextConnection = true;
            //CacheHelper.CacheItemPriority = System.Web.Caching.CacheItemPriority.NotRemovable;
            if (SqlHelperClass.IsConnectionStringInitialized)
            {
                using (CMSConnectionScope scope = new CMSConnectionScope())
                {
                    // Use single open connection for the application start
                    GeneralConnection conn = (GeneralConnection)scope.Connection;
                    bool closeConnection = true;
                    try
                    {
                        // Open the connection
                        conn.Open();
                        closeConnection = true;

                        // Initialize the environment
                        CMSFunctions.Init();

                        // Update the system !! IMPORTANT - must be first
                        UpgradeProcedure.Update(conn);

                        try
                        {
                            // Write "Application start" event to the event log
                            EventLogProvider ev = new EventLogProvider(conn);

                            ev.DeleteOlderLogs = false;
                            ev.LogEvent("I", DateTime.Now, "Application_Start", "STARTAPP", 0, null, 0, "", null, "", 0, HTTPHelper.GetAbsoluteUri());
                        }
                        catch
                        {
                            // can't write to log, do not process any code
                        }

                        // Delete memory synchronization tasks
                        WebSyncHelper.DeleteMemorySynchronizationTasks();

                        // Wait until initialization is complete
                        CMSFunctions.WaitForInitialization();
                    }
                    finally
                    {
                        // Close the connection
                        if (closeConnection)
                        {
                            conn.Close();
                        }
                    }
                }
            }
            else
            {
                // Register virtual path provider
                if (ValidationHelper.GetBoolean(SettingsHelper.AppSettings["CMSUseVirtualPathProvider"], true))
                {
                    CMS.VirtualPathHelper.VirtualPathHelper.RegisterVirtualPathProvider();
                }
            }

            CMSApplication.AfterApplicationStart(sender, e);
            DebugHelper.ReleaseContext();

            // Log when the overall application start finished its execution
            mApplicationStartFinished = DateTime.Now;
            mApplicationInitialized = true;

             // Set that document aliases don't have metafiles
            DocumentAliasInfo.TYPEINFO.HasMetaFiles = false;



            RequestHelper.LogRequestOperation("AfterApplicationStart", null, 0);
        }
    }