The difference between async and multithreading

Multithreading will have a worker thread that consumes more CPU.

Asynchronous will use the DMA mode IO operation

usingSystem;usingSystem.Collections.Generic;usingSystem.IO;usingSystem.Linq;usingSystem.Net;usingSystem.Text;usingSystem.Threading;usingSystem.Threading.Tasks;namespaceconsoleapplication1{classProgram {Static voidMain (string[] args) {            varp =NewProgram (); varURL ="http://bj.58.com/";            P.asynchronous (URL);            P.multithread (URL);        Console.readkey (); }        voidAsynchronous (stringURL) {            varRequest =httpwebrequest.create (URL); Request. BeginGetResponse (IAsyncResult ar)= {                varRequest_inner = ar. AsyncState asWebRequest; varResponse =request.                EndGetResponse (AR); Read (response,"Asynchronous");        }, request); }        voidMultithread (stringURL) {            vart =NewThread (() =            {                varRequest =httpwebrequest.create (URL); varResponse =request.                GetResponse (); Read (response,"multithread");            });        T.start (); }        Private Static voidRead (WebResponse response,stringfuncname) {            varstream =Response.            GetResponseStream (); using(varReader =NewStreamReader (Stream)) {Console.WriteLine ("{0} {1}", FuncName, reader. ReadToEnd ().            Length); }        }    }}

The difference between async and multithreading