C#基础------文件读写操作

    class Program
    {
        static void Main(string[] args)
        {
            //FileStream 写入文件
            //FileMode.Create 新内容覆盖老内容

            using (FileStream fs = new FileStream(@"C:\Users\Administrator\Desktop\C#OOP练习\my.txt",FileMode.Create))
            {
                byte[] bytes = Encoding.Default.GetBytes("你好，如鹏网");
                fs.Write(bytes, 0, bytes.Length);
            }

            //FileStream 读取文件
            using (FileStream fs = new FileStream(@"C:\Users\Administrator\Desktop\C#OOP练习\my.txt",FileMode.Open))
            {
                byte[] bytes = new byte[4];
                int length;

                while ((length = fs.Read(bytes, 0, bytes.Length)) > 0)
                {
                   string s = Encoding.Default.GetString(bytes, 0, length);
                   Console.WriteLine(s);
                }
            }
            Console.ReadKey();
        }
    }