OpenTween.TweenMain.NotifyEvent C# (CSharp) Method

        private void NotifyEvent(Twitter.FormattedEvent ev)
        {
            //新着通知 
            if (BalloonRequired(ev))
            {
                NotifyIcon1.BalloonTipIcon = ToolTipIcon.Info;
                //if (SettingDialog.DispUsername) NotifyIcon1.BalloonTipTitle = tw.Username + " - "; else NotifyIcon1.BalloonTipTitle = "";
                //NotifyIcon1.BalloonTipTitle += Application.ProductName + " [" + ev.Event.ToUpper() + "] by " + ((string)(!string.IsNullOrEmpty(ev.Username) ? ev.Username : ""), string);
                StringBuilder title = new StringBuilder();
                if (this._cfgCommon.DispUsername)
                {
                    title.Append(tw.Username);
                    title.Append(" - ");
                }
                else
                {
                    //title.Clear();
                }
                title.Append(Application.ProductName);
                title.Append(" [");
                title.Append(ev.Event.ToUpper(CultureInfo.CurrentCulture));
                title.Append("] by ");
                if (!string.IsNullOrEmpty(ev.Username))
                {
                    title.Append(ev.Username);
                }
                else
                {
                    //title.Append("");
                }
                string text;
                if (!string.IsNullOrEmpty(ev.Target))
                {
                    //NotifyIcon1.BalloonTipText = ev.Target;
                    text = ev.Target;
                }
                else
                {
                    //NotifyIcon1.BalloonTipText = " ";
                    text = " ";
                }
                //NotifyIcon1.ShowBalloonTip(500);
                if (this._cfgCommon.IsUseNotifyGrowl)
                {
                    gh.Notify(GrowlHelper.NotifyType.UserStreamEvent,
                              ev.Id.ToString(), title.ToString(), text);
                }
                else
                {
                    NotifyIcon1.BalloonTipIcon = ToolTipIcon.Info;
                    NotifyIcon1.BalloonTipTitle = title.ToString();
                    NotifyIcon1.BalloonTipText = text;
                    NotifyIcon1.ShowBalloonTip(500);
                }
            }

            //サウンド再生
            string snd = this._cfgCommon.EventSoundFile;
            if (!_initial && this._cfgCommon.PlaySound && !string.IsNullOrEmpty(snd))
            {
                if ((ev.Eventtype & this._cfgCommon.EventNotifyFlag) != 0 && IsMyEventNotityAsEventType(ev))
                {
                    try
                    {
                        string dir = Application.StartupPath;
                        if (Directory.Exists(Path.Combine(dir, "Sounds")))
                        {
                            dir = Path.Combine(dir, "Sounds");
                        }
                        using (SoundPlayer player = new SoundPlayer(Path.Combine(dir, snd)))
                        {
                            player.Play();
                        }
                    }
                    catch (Exception)
                    {
                    }
                }
            }
        }