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)          {            // Read the contents of the file into the stream             stream stream =  file.open ("Test.txt",  filemode.openorcreate);             //initialize an array of bytes             byte[]  bytes = new byte[(int) stream. length];            //stream is read into byte array              stream. Read (bytes, 0, bytes. LENGTH);             //receive  &nbs with MemoryStreamp;          memorystream ms = new  MemoryStream (bytes);             //settings from the beginning              ms. 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>        ///  asynchronously reads txt text content          /// </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))                  {       &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;RETURN&NBSP;AWAIT&NBSP;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