private void DOWNLOAD_BUTTON_Click(object sender, EventArgs e)
        {
            Webtoon.DownloadBlockList.Clear( );

            int count = 0;

            for (int i = 0; i < webtoonPageList.Controls.Count; i++)
            {
                WebtoonListChild webtoonListChild = ( WebtoonListChild )webtoonPageList.Controls[i];

                if (webtoonListChild.blocked)
                {
                    Webtoon.DownloadBlockList.Add(webtoonListChild.info.num);
                    count++;
                }
            }

            if (count >= baseInformation.pages.Count)
            {
                NotifyBox.Show(this, "오류", "최소 1개의 화는 다운받아야 합니다.", NotifyBoxType.OK, NotifyBoxIcon.Error);
                return;
            }

            FolderBrowserDialog dialog = new FolderBrowserDialog( )
            {
                ShowNewFolderButton = true,
                Description         = "해당 웹툰을 어디에 저장하시겠습니까?"
            };

            if (dialog.ShowDialog( ) == DialogResult.OK)
            {
                Webtoon.BaseDirectory = dialog.SelectedPath;
                DownloadOptionReturn.Invoke(DownloadOptionResult.DownloadClick, null);
            }
        }
        private void CLOSE_BUTTON_Click(object sender, EventArgs e)
        {
            NotifyBoxResult result = NotifyBox.Show(this, "질문", "다운로드를 취소하시겠습니까?", NotifyBoxType.YesNo, NotifyBoxIcon.Question);

            if (result == NotifyBoxResult.Yes)
            {
                DownloadOptionReturn.Invoke(DownloadOptionResult.Cancel, null);
            }
        }