private void buttonSelectFolder_Click(object sender, EventArgs e)
        {
            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
            {
                Wallpaper.selectedFolderPath = folderBrowserDialog1.SelectedPath;

                string[] fileInfoJPG = Directory.GetFiles(Wallpaper.selectedFolderPath, "*.jpg", SearchOption.AllDirectories);
                string[] fileInfoPNG = Directory.GetFiles(Wallpaper.selectedFolderPath, "*.png", SearchOption.AllDirectories);

                if (fileInfoJPG.Length == 0 && fileInfoPNG.Length == 0)
                {
                    MessageBox.Show("Please select a folder with PNG or JPG image(s) in it.", "ERROR", MessageBoxButtons.OK);
                    Wallpaper.selectedFolderPath = null;
                    return;
                }
                else
                {
                    Settings.ChangeSetting(Settings.settings.wallpaperFolderDirectory, Wallpaper.selectedFolderPath);
                    Wallpaper.fileInfoJPG = Directory.GetFiles(Wallpaper.selectedFolderPath, "*.jpg", SearchOption.AllDirectories);
                    Wallpaper.fileInfoPNG = Directory.GetFiles(Wallpaper.selectedFolderPath, "*.png", SearchOption.AllDirectories);
                    string path = Wallpaper.GetNewWallpaper(isShuffle.Checked);

                    pictureBox1.Image    = Image.FromFile(Wallpaper.wallpaperFile.FullName);
                    pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;

                    if (path != null)
                    {
                        pictureBox1.LoadAsync(path);

                        SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, Wallpaper.BurnNewWallpaper(Wallpaper.wallpaperFile.FullName), SPIF_UPDATEINIFILE);
                    }
                }
            }
        }
        private void timer1_Tick(object sender, EventArgs e)    //Every minute.
        {
            timerCounter++;

            if (!String.IsNullOrEmpty(Settings.ReadSetting(Settings.settings.wallpaperFolderDirectory)) && !String.IsNullOrWhiteSpace(Settings.ReadSetting(Settings.settings.wallpaperFolderDirectory))) //Is wallpaperFolderDirectory selected && that selected directory is NullORWhiteSpace
            {
                SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, Wallpaper.BurnNewWallpaper(Wallpaper.wallpaperFile.FullName), SPIF_UPDATEINIFILE);
                pictureBox1.LoadAsync(Wallpaper.wallpaperFile.FullName);

                if (timerCounter == Convert.ToInt32(numericWallpaperTime.Value)) //If it's time to get a new wallpaper.
                {
                    timerCounter = 0;

                    string path = Wallpaper.GetNewWallpaper(isShuffle.Checked);
                    if (path != null)
                    {
                        pictureBox1.Image    = Image.FromFile(Wallpaper.wallpaperFile.FullName);
                        pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;

                        pictureBox1.LoadAsync(path);

                        SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, Wallpaper.BurnNewWallpaper(Wallpaper.wallpaperFile.FullName), SPIF_UPDATEINIFILE);
                    }
                }

                else if (timerCounter > Convert.ToInt32(numericWallpaperTime.Value)) //Stop timerCounter going over the max minutes.
                {
                    timerCounter = 0;
                }
            }
        }