Beagrep.Util.FileSystem.GetTempFileName C# (CSharp) Метод

        public static string GetTempFileName(string extension)
        {
            FileStream f = null;
                        string path;
                        Random rnd;
                        int num = 0;

            if (! String.IsNullOrEmpty (extension) && extension [0] != '.')
                extension = "." + extension;

                        rnd = new Random ();
                        do {
                                num = rnd.Next ();
                                num++;
                                path = Path.Combine (Path.GetTempPath(), "tmp" + num.ToString("x") + extension);

                                try {
                                        f = new FileStream (path, FileMode.CreateNew);
                                } catch { }
                        } while (f == null);

                        f.Close();
                        return path;
        }