c# - CRM Dynamics Plugin Error : The given key was not present in the dictionary (When I trigger plugin on PhoneCall Create) -

i following error when fire plugin on phoncall create record in crm dynamics 2015,

public void execute(iserviceprovider serviceprovider) { itracingservice tracingservice = (itracingservice)serviceprovider.getservice(typeof(itracingservice));

        ipluginexecutioncontext context = (ipluginexecutioncontext)serviceprovider.getservice(typeof(ipluginexecutioncontext));          iorganizationservicefactory servicefactory = (iorganizationservicefactory)serviceprovider.getservice(typeof(iorganizationservicefactory));         iorganizationservice service = servicefactory.createorganizationservice(context.userid);            if (context.inputparameters.contains("target") && context.inputparameters["target"] entity)         {             entity entity = (entity)context.inputparameters["target"];              if (context.messagename == "create")             {                 try                 {                     entity phonecall = new entity("phonecall");                      int64 numbertocall = (int64)phonecall.attributes["new_identity"];                     int64 receivecallon = (int64)phonecall.attributes["new_destination"];                     var apikey = phonecall.attributes["new_apikey"].tostring();                     int64 fid = (int64)phonecall.attributes["new_fid"];                      guid phoneresponse = service.create(phonecall);                      basichttpbinding binding = new basichttpbinding();                     binding.name = "basichttpbinding_iservice1";                     binding.hostnamecomparisonmode = hostnamecomparisonmode.strongwildcard;                     binding.messageencoding = wsmessageencoding.text;                     binding.transfermode = transfermode.buffered;                     binding.usedefaultwebproxy = true;                     binding.security.mode = basichttpsecuritymode.transportcredentialonly;                     binding.security.transport.clientcredentialtype = httpclientcredentialtype.windows;                     binding.security.message.clientcredentialtype = basichttpmessagecredentialtype.username;                      binding.sendtimeout = new timespan(0, 10, 0);                      endpointaddress endpointaddress = new endpointaddress("http://localhost:62009/service1.svc");                       servicereference1.service1client client = new servicereference1.service1client(binding, endpointaddress);                      client.clientcredentials.windows.allowedimpersonationlevel = system.security.principal.tokenimpersonationlevel.impersonation;                      client.channelfactory.credentials.windows.clientcredential = new system.net.networkcredential("mscrm\\thabiso", "1pft?mg6bscu?g", "mscrm0");                      client.webcall(numbertocall, receivecallon, apikey, fid);                  }                 catch (faultexception<organizationservicefault> ex)                 {                     tracingservice.trace("myplugin: {0}", ex.tostring());                     throw;                  }             } 

i believe answer phonecall record doesn't contain 1 of fields referring to. , doesn't contain values... because instantiate new instance of entity field values not appear nowhere... suggest delete line

entity phonecall = new entity("phonecall"); 

and replace phonecall entity in lines:

                int64 numbertocall = (int64)phonecall.attributes["new_identity"];                 int64 receivecallon = (int64)phonecall.attributes["new_destination"];                 var apikey = phonecall.attributes["new_apikey"].tostring();                 int64 fid = (int64)phonecall.attributes["new_fid"]; 

not sure why want create 1 phonecall after... please explai scenario?