C# Socket Exception : an attempt was made to access a socket in a way forbidden by its access permissions -

this code using. code got internet, said working fine. comments don't understand why not working me. , 1 more thing using application user mode not in administrator mode.

private void btnstart_click(object sender, eventargs e)     {         if (cmbinterfaces.text == "")         {             messagebox.show("select interface capture packets.", "mjsniffer",                  messageboxbuttons.ok, messageboxicon.error);             return;         }         try         {             if (!bcontinuecapturing)                     {                 //start capturing packets...                  btnstart.text = "&stop";                  bcontinuecapturing = true;                  //for sniffing socket capture packets has raw socket,                 //address family being of type internetwork, , protocol being ip                 console.writeline("1");                 mainsocket = new socket(addressfamily.internetwork,                     sockettype.raw, protocoltype.ip);                 console.writeline("2");                 //bind socket selected ip address                 mainsocket.bind(new ipendpoint(ipaddress.parse(cmbinterfaces.text), 0));                 console.writeline("3");                 //set socket  options                 mainsocket.setsocketoption(socketoptionlevel.ip,            //applies ip packets                                            socketoptionname.headerincluded, //set include header                                            true);                           //option true                 console.writeline("4");                 byte[] bytrue = new byte[4] {1, 0, 0, 0};                 byte[] byout = new byte[4]{1, 0, 0, 0}; //capture outgoing packets                  //socket.iocontrol analogous wsaioctl method of winsock 2                 mainsocket.iocontrol(iocontrolcode.receiveall,              //equivalent sio_rcvall constant                                                                             //of winsock 2                                      bytrue,                                                                          byout);                  //start receiving packets asynchronously                 mainsocket.beginreceive(bytedata, 0, bytedata.length, socketflags.none,                     new asynccallback(onreceive), null);             }             else             {                 btnstart.text = "&start";                 bcontinuecapturing = false;                 //to stop capturing packets close socket                 mainsocket.close ();             }         }         catch (socketexception ex)         {             console.writeline("5");             messagebox.show(ex.message, "mjsniffer", messageboxbuttons.ok, messageboxicon.error);         }         catch (exception ex)         {             console.writeline("6");             messagebox.show(ex.message, "mjsniffer", messageboxbuttons.ok, messageboxicon.error);         }     } 

and 1 more thing using application user mode not in administrator mode.

this can't work. following written win32 api, since that's .net calls down into, same applies:

to use socket of type sock_raw requires administrative privileges. users running winsock applications use raw sockets must member of administrators group on local computer, otherwise raw socket calls fail error code of wsaeacces. on windows vista , later, access raw sockets enforced @ socket creation. in earlier versions of windows, access raw sockets enforced during other socket operations.

(my emphasis)