ImageGlass.frmMain.Prepare C# (CSharp) Method

        public void Prepare(string path)
        {
            if (File.Exists(path) == false && Directory.Exists(path) == false)
                return;

            //Reset current index
            GlobalSetting.CurrentIndex = 0;
            string initFile = "";

            //Check path is file or directory?
            if (File.Exists(path))
            {
                initFile = path;
                path = path.Substring(0, path.LastIndexOf("\\") + 1);
            }
            else if (Directory.Exists(path))
            {
                path = path.Replace("\\\\", "\\");
            }

            //Declare a new list to store filename
            GlobalSetting.ImageFilenameList = new List<string>();

            //Get supported image extensions from path
            GlobalSetting.ImageFilenameList = LoadImageFilesFromDirectory(path);

            //Dispose all garbage
            GlobalSetting.ImageList.Dispose();

            //Set filename to image list
            GlobalSetting.ImageList = new ImgMan(GlobalSetting.ImageFilenameList.ToArray());

            //Find the index of current image
            GlobalSetting.CurrentIndex = GlobalSetting.ImageFilenameList.IndexOf(initFile);

            //Load thumnbnail
            LoadThumbnails();

            //Cannot find the index
            if (GlobalSetting.CurrentIndex == -1)
            {
                //Mark as Image Error
                GlobalSetting.IsImageError = true;
                Text = "ImageGlass - " + initFile;
                lblInfo.Text = ImageInfo.GetFileSize(initFile);
                picMain.Text = GlobalSetting.LangPack.Items["frmMain.picMain._ErrorText"];
                picMain.Image = null;

                //Exit function
                return;
            }

            //Start loading image
            NextPic(0);

            //Watch all changes of current path
            sysWatch.Path = Path.GetDirectoryName(GlobalSetting.ImageList.GetFileName(GlobalSetting.CurrentIndex));
            sysWatch.EnableRaisingEvents = true;
        }