Operation of C # IO stream

The operation of the C # IO stream is very important, and we use this technique for reading and writing files, which shows an example of a file content copy, briefly explaining IO operations in C #.

Namespace consoleapplication1{    class program    {        static void Main (string[] args)        {            //reads the contents of the file into the stream            Stream stream = File.Open ("test.txt", FileMode.OpenOrCreate);            Initializes a byte array of            byte[] bytes = new byte[(int) stream. Length];            Reads a stream into a byte array of            stream. Read (bytes, 0, bytes. Length);            Receive            MemoryStream ms = new MemoryStream (bytes) with MemoryStream;            Set MS at the beginning            . Seek (0, seekorigin.begin);            Then write the returned MemoryStream to another file to            Ms. WriteTo (New FileStream ("NewFile.txt", FileMode.OpenOrCreate));}}}    

Stream is an abstract class, while MemoryStream and FileStream are subclasses of Sream.

The following example demonstrates the asynchronous way to read the contents of a txt text.

Namespace consoleapplication1{    class program    {        static void Main (string[] args)        {            Console.WriteLine (Gettxt (). Result);        }        <summary>///        read txt text content asynchronously///</summary>//        <returns></returns>        public static async task<string> Gettxt ()        {            using (Stream stream = File.Open ("Test.txt", FileMode.OpenOrCreate)            {                using (StreamReader sr = new StreamReader (stream, Encoding.default))                {                    return await Sr. Readtoendasync ();}}}}    

for more classes and operations on Io Please refer to: Https://msdn.microsoft.com/zh-cn/library/system.io (v=vs.110). aspx.

Operation of C # IO stream