C# StreamReader和StreamWriter用法

            #region StreamReader读取txt文件
            //using (StreamReader streamReader = new StreamReader(@"C:\Users\admin\Desktop\1.txt", Encoding.UTF8))
            //{
            //    while (!streamReader.EndOfStream)
            //    {
            //        Console.WriteLine(streamReader.ReadLine());
            //    }
            //}
            //Console.ReadKey();
            #endregion

            #region StreamWriter写入字符串
            //using (StreamWriter streamWriter = new StreamWriter(@"C:\Users\admin\Desktop\1.txt", true, Encoding.UTF8))
            //{
            //    streamWriter.Write("今天天气好晴朗！");
            //}
            //Console.WriteLine("写入成功!");
            //Console.ReadKey();
            #endregion