ImageGlass.frmMain.mnuMainSlideShowStart_Click C# (CSharp) Method

        private void mnuMainSlideShowStart_Click(object sender, EventArgs e)
        {
            if (GlobalSetting.ImageList.Length < 1)
            {
                return;
            }

            //not performing
            if (!GlobalSetting.IsPlaySlideShow)
            {
                //perform slideshow
                picMain.BackColor = Color.Black;
                btnFullScreen.PerformClick();

                timSlideShow.Start();
                timSlideShow.Enabled = true;

                GlobalSetting.IsPlaySlideShow = true;
            }
            //performing
            else
            {
                mnuMainSlideShowExit_Click(null, null);
            }

            DisplayTextMessage(GlobalSetting.LangPack.Items["frmMain._SlideshowMessage"]
                    , 5000);
        }