StreamReader and StreadWriter

                FileInfo file = new FileInfo(@"E:\jj.txt");
                StreamReader sr = new StreamReader(@"E:\\dd.txt");
                FileStream fs = new FileStream(@"E:\jj.txt", FileMode.Create);

                StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.GetEncoding("utf-8"));
                string content = sr.ReadLine();

                while (!string.IsNullOrEmpty(content))
                {
                    content = content.Substring(5);
                    Console.WriteLine(content);
                    sw.WriteLine(content.ToCharArray());
                    content = sr.ReadLine();
                }
　　　　　　　　  sw.Close();
           　　 fs.Close();