c# - Get User Info after successful authentication using Windows Broker Authentication in Windows Metro App -

i working on windows broker authentication.i can authenticate in calling app , can comeback home page after authentication.

i not able user info (username) .i have tried 1 message written below.

a first chance exception of type 'system.exception' occurred in mscorlib.dll winrt information: response status code not indicate success: 401 (unauthorized). additional information: unauthorized (401). response status code not indicate success: 401 (unauthorized). if there handler exception, program may safely continued.

i have written code below.please friends me.

  private const string resource_name ="id_token";    public async task<userinfo> getname(string accesstoken)         {             try             {                 var client = new httpclient();                  client.defaultrequestheaders.authorization = new windows.web.http.headers.httpcredentialsheadervalue("oauth", accesstoken);                  var result = await client.getstringasync(new uri(loginuri));                  var profileinformation =jsonobject.parse(result).getobject();                  var name = profileinformation.getnamedstring("username");                 return new userinfo { name = name };             }              catch (jsonexception ex)             {                 throw new jsonexception(ex.message);             }             }      private async void btnhomelogin_click(object sender, routedeventargs e)     {         string scope = "openid profile";         var client = new oauth2client(new uri(loginuri));          var starturi = client.createauthorizeurl(             clientid,             resource_name,             scope,             redirecturi,              state,             nonce);         string authresult;         try         {             var webauthenticationresult = await webauthenticationbroker.authenticateasync(webauthenticationoptions.none, new uri(starturi),new uri(redirecturi));              switch (webauthenticationresult.responsestatus)             {                 case windows.security.authentication.web.webauthenticationstatus.success:                     //successful authentication.                     authresult = webauthenticationresult.responsedata.tostring();                      userinfo userinfo = await getname(resource_name);                       break;                 case windows.security.authentication.web.webauthenticationstatus.errorhttp:                     //http error.                     authresult = webauthenticationresult.responseerrordetail.tostring();                     break;                 default:                     //other error.                     authresult = webauthenticationresult.responsedata.tostring();                     break;             }         }         catch (exception ex)         {             //authentication failed. handle parameter, ssl/tls, , network unavailable errors here.              authresult = ex.message;         }      } 

if using above code, based on above, calling getname function constant string (resource_name) instead of actual authresult (accesstoken) returned webauthenticationresult. if intention of calling webauthenticationbroker access token should later used httpclient, need adjust code accordingly , make use of right access token when calling httpclient code. otherwise 401 not unexpected if not passing right token.