StreamWriter和StremReader简单的用法

                string str = "中国";//写入的内容
                string path = @"e:1.txt";//文件路径
                StreamWriter sw = new StreamWriter(path, true, Encoding.Unicode);
                sw.Write(str);
                sw.Close();
                Console.ReadKey();

 string path1 = @"e:1.txt";//文件路径
                FileStream fsFile = new FileStream(path1, FileMode.Open);
                StreamReader srReader = new StreamReader(fsFile);
                int iChar;
                iChar = srReader.Read();
                while (iChar != -1)
                {
                    txbValue.Text += (Convert.ToChar(iChar));
                    iChar = srReader.Read();
                }
                srReader.Close();