C# 生成sitemap.txt文件

//TXT
                string sitemaptxtname = "sitemap.txt";
                string sitemapTxTFileFullNamePath = string.Format(sitemapPath + "/{0}", sitemaptxtname);
                FileStream fs = new FileStream(sitemapTxTFileFullNamePath, FileMode.Create, FileAccess.Write);
                StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.UTF8);
                sw.BaseStream.Seek(0, SeekOrigin.End);
                sw.WriteLine("https://www.yadinghao.com");
                sw.Flush();
                sw.Close();