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 != -)
                 {
                     txbValue.Text += (Convert.ToChar(iChar));
                     iChar = srReader.Read();
                 }
                 srReader.Close();