c# - I am getting error code 10061 when I try to check the availability of Port -


i trying find port availability of below c# code, , getting exception "error code 10061: connection refused " need in solving issue. ports open shown closed facing porblem

class program {     private string _hosturi;     private static bool m_blniswinauth = false;      static void main(string[] args)     {         hostname tcp;         bool udp = false;         program pr = new program();         tcp = pr.getportavability("127.0.0.1", 80, true);         console.writeline(tcp);         console.readline();     }      public hostname getportavability(string _hosturi, int _portnumber, bool istcp)     {         hostname returnvalue = new hostname();         returnvalue.hostname = _hosturi;         returnvalue.result = false;          ipaddress ipa = (ipaddress)dns.gethostaddresses(_hosturi)[0];          try         {             socket sock;              if (istcp)                 sock = new socket(addressfamily.internetwork, sockettype.stream, protocoltype.tcp);             else                 sock = new socket(addressfamily.internetwork, sockettype.dgram, protocoltype.udp);              sock.connect(ipa, _portnumber);              if (sock.connected)                 returnvalue.result = true;             else                 returnvalue.result = false;              sock.close();         }         catch (socketexception se)         {             if (se.errorcode == 10061)                 returnvalue.result = true;             else                 returnvalue.result = false;         }         catch (exception e)         {             returnvalue.result = false;         }          return returnvalue;            } }

error 10061 connection refused server
makes sense me because trying connect socket given ip address , port number. there no other socket waiting connection.
need find different way. 'endpoint'.


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