c# - Azure Mobile Service .NET Backend HttpResponseMessage return null Content -


i had function in web api of mobile service declared 

public httpresponsemessage post(loginrequest loginrequest) {     easyparkcontext context = new easyparkcontext();     user user = context.users.singleordefault(a => a.username == loginrequest.username);     if (user != null)     {         if (bcrypt.net.bcrypt.verify(loginrequest.password, user.password))         {             claimsidentity claimsidentity = new claimsidentity();             claimsidentity.addclaim(new claim(claimtypes.primarysid, user.id));             claimsidentity.addclaim(new claim(claimtypes.nameidentifier, loginrequest.username));             loginresult loginresult = new easyparkloginprovider(handler).createloginresult(claimsidentity, services.settings.masterkey);             return this.request.createresponse(httpstatuscode.ok, loginresult);         }     }     return this.request.createresponse(httpstatuscode.unauthorized, "invalid username or password"); }

and function declared in client 

public async task<bool> login(string username, string password) {     loginrequest loginrequest = new loginrequest() { username = username, password = password };     try     {         httpresponsemessage loginresult = await _service.invokeapiasync<loginrequest, httpresponsemessage>("easyparklogin", loginrequest);         jobject json = jobject.parse(loginresult.content.tostring());         _service.currentuser = new mobileserviceuser(json["user"]["userid"].tostring().replace("easypark:", ""))         {             mobileserviceauthenticationtoken = json["authenticationtoken"].tostring()         };         return true;     }     catch (exception e)     {         return false;     } }

it works @ mobile service page, returning null during client code, sorry can't attached image due reputation...

public async task<bool> login(string username, string password) {     loginrequest loginrequest = new loginrequest() { username = username, password = password };     try     {         var loginresult = await _service.invokeapiasync("easyparklogin", jtoken.fromobject(loginrequest));         jobject json = jobject.parse(loginresult.tostring());         _service.currentuser = new mobileserviceuser(json["user"]["userid"].tostring().replace("easypark:", ""))         {             mobileserviceauthenticationtoken = json["authenticationtoken"].tostring()         };         return true;     }     catch (exception e)     {         return false;     } }

by changing code: 

httpresponsemessage loginresult = await _service.invokeapiasync<loginrequest, httpresponsemessage>("easyparklogin", loginrequest); jobject json = jobject.parse(loginresult.content.tostring());

to 

var loginresult = await _service.invokeapiasync("easyparklogin", jtoken.fromobject(loginrequest)); jobject json = jobject.parse(loginresult.tostring());

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