c# - windows form app sending strings -

i made tcp/ip chat windows form application , works fine want make application send text automatically don't want user click send button live streaming!

and using asynchronous connection.

using system; using system.collections.generic; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using system.threading.tasks; using system.windows.forms;   using system.net; using system.net.sockets;  namespace chat {     public partial class form1 : form     {         socket sck;         endpoint eplocal, epremote;           public form1()         {             initializecomponent();              sck = new socket(addressfamily.internetwork, sockettype.dgram, protocoltype.udp);             sck.setsocketoption(socketoptionlevel.socket, socketoptionname.reuseaddress, true);             textbox1.text = getlocalip();//this application running ip address             //textbox5.text = getlocalip();         }          private string getlocalip()         {              iphostentry host;             host = dns.gethostentry(dns.gethostname());             foreach (ipaddress ip in host.addresslist)             {                 if(ip.addressfamily == addressfamily.internetwork)                 {                       return ip.tostring();                 }             }              return "127.0.0.1"; //here put android device's ip          }          private void messagecallback(iasyncresult aresult)         {             try {                  int size = sck.endreceivefrom(aresult, ref epremote);                  if(size>0)                 {                     byte[] receiveddata = new byte[1464];                     receiveddata = (byte[])aresult.asyncstate;                      asciiencoding eencoding = new asciiencoding();                     string receivedmessage = eencoding.getstring(receiveddata);                     //b3deen bntba3 el msg bs b7aletna bdna n5li el touch active.                     listbox1.items.add("sender:" + receivedmessage);                 }                  byte[] buffer = new byte[1500];                 sck.beginreceivefrom(buffer, 0, buffer.length, socketflags.none, ref epremote, new asynccallback(messagecallback), buffer);              }             catch (exception exp)             {                 messagebox.show(exp.tostring());             }         }           private void button1_click(object sender, eventargs e)         {                  try                 {                     //binding message                     eplocal = new ipendpoint(ipaddress.parse("192.168.1.9"), convert.toint32("80"));                     sck.bind(eplocal);                     //hoon el address ta3 el mobile                      epremote = new ipendpoint(ipaddress.parse("192.168.1.9"), convert.toint32("81"));//texbox5 bn7at el ip ta3 el android wl txt el tani ta3 le port                     //hoon bn3ml connect network                     sck.connect(epremote);                      byte[] buffer = new byte[1500];                     sck.beginreceivefrom(buffer, 0, buffer.length, socketflags.none, ref epremote, new asynccallback(messagecallback), buffer);                      button1.text = "connected";                     button1.enabled = false;                     button2.enabled = true;                     textbox3.focus();                      //trying live sending                     }                   catch (exception exp)                 {                     messagebox.show(exp.tostring());                 }          }        private void button2_click(object sender, eventargs e)         {           try             {                 system.text.asciiencoding enc = new system.text.asciiencoding();                 byte[] msg = new byte[1500];                 msg = enc.getbytes(textbox3.text);                  sck.send(msg);                 listbox1.items.add("you:" + textbox3.text);               }catch (exception exp)             {                 messagebox.show(exp.tostring());             }            // close();          }     } } 

i assume want send text user entered finished type it. if i'd bad idea because confuse users, add timer counting time since user's last key stroke , if given time passed (let's 5 secs), invokes method button click invoking send string.