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Parameter                                                                Details path                The locationof thefile. append           Ifthefileexist,truewilladddatatotheendofthefile(append),falsewilloverwritethefile. text Text to be written or stored. contents        A collection of strings to be written. source            The location of the file you want to use. dest       The location you want…

Section98.1:BasicTCPCommunicationClient ThiscodeexamplecreatesaTCPclient,sends"HelloWorld"overthesocketconnection,andthenwritestheserver response to the console before closing the connection. //DeclareVariables stringhost="stackoverflow.com"; intport=9999; inttimeout=5000; //CreateTCPclientandconnect using(var_client=newTcpClient(host,port)) using(var_netStream=_client.GetStream()) { _netStream.ReadTimeout=timeout; //Writeamessageoverthesocket stringmessage="HelloWorld!"; byte[]dataToSend=System.Text.Encoding.ASCII.GetBytes(message); _netStream.Write(dataToSend,0,dataToSend.Length); //Readserverresponse byte[]recvData=newbyte[256]; intbytes=_netStream.Read(recvData,0,recvData.Length); message=System.Text.Encoding.ASCII.GetString(recvData,0,bytes); Console.WriteLine(string.Format("Server: {0}",message)); };//Theclientandstreamwillcloseascontrolexitstheusingblock(Equivilentbutsaferthan callingClose(); Section98.2: Download a file froma web server…

Section99.1:CreatingandsendinganHTTPPOSTrequest usingSystem.Net; usingSystem.IO; ... stringrequestUrl="https://www.example.com/submit.html"; HttpWebRequestrequest=HttpWebRequest.CreateHttp(requestUrl); request.Method="POST"; //Optionally,setpropertiesoftheHttpWebRequest,suchas:request.AutomaticDecompression=DecompressionMethods.Deflate|DecompressionMethods.GZip; request.ContentType="application/x-www-form-urlencoded"; //CouldalsosetotherHTTPheaderssuchasRequest.UserAgent,Request.Referer, //Request.Accept,orotherheadersviatheRequest.Headerscollection. //SetthePOSTrequestbodydata.Inthisexample,thePOSTdataisin //application/x-www-form-urlencodedformat. stringpostData="myparam1=myvalue1&myparam2=myvalue2"; using(varwriter=newStreamWriter(request.GetRequestStream())) { writer.Write(postData); } //Submittherequest,andgettheresponsebodyfromtheremoteserver. stringresponseFromRemoteServer; using(HttpWebResponseresponse=(HttpWebResponse)request.GetResponse()) { using(StreamReaderreader=newStreamReader(response.GetResponseStream())) { responseFromRemoteServer=reader.ReadToEnd(); } } Section99.2:CreatingandsendinganHTTPGETrequest usingSystem.Net; usingSystem.IO; ... stringrequestUrl="https://www.example.com/page.html"; HttpWebRequestrequest=HttpWebRequest.CreateHttp(requestUrl); //Optionally,setpropertiesoftheHttpWebRequest,suchas:request.AutomaticDecompression=DecompressionMethods.GZip|DecompressionMethods.Deflate; request.Timeout=2*60*1000;//2minutes,inmilliseconds //Submittherequest,andgettheresponsebody. stringresponseBodyFromRemoteServer; using(HttpWebResponseresponse=(HttpWebResponse)request.GetResponse())…