C # get local IP address and MAC address

C # get local IP Address and MAC Address   1, obtain the LAN IP address through the host name;             try              {                 iphostentry iphostentry = Dns.gethostentry (Txthost.text);//pass Computer name                  if (ipHostEntry.Aliases.Length > 0)                 {                     foreach (string Alias in iphostentry.aliases)                          txtip.text = alias;                }                 //Get IP address                  foreach (IPAddress addr in iphostentry.addresslist)                      Txtipaddress.text = addr. ToString ();//Get IP address             }              Catch              {                MessageBox.Show ("Wrong host name.") ");            } 2, get host name via LAN IP address; try              {                iphostentry iphostentry = dns.gethostbyaddress (Txtip.text); ;//Pass IP address                txthostname.text = IpHostEntry.HostName.ToString ()//Get host name            }             Catch              {                MessageBox.Show ("Wrong IP Address"). ");            } 3, get MAC address public static string Readmac via LAN IP address (string IP)//IP address, you can return the MAC address         {             string mac = "";             System.Diagnostics.Process p = new System.Diagnostics.Process ();             p.startinfo.filename = "nbtstat";             p.startinfo.arguments = "-a" + IP;             P.startinfo.useshellexecute = false;             P.startinfo.createnowindow = true;             P.startinfo.redirectstandardoutput = true;                           P.start ();             string output = P.standardoutput.readtoend ();             int len = output. IndexOf ("MAC address =");             if (len>0)              {             & NBsp;  mac = output. Substring (len + 14, 17);            }                          p.WaitForExit ( );                          return mac;        }