c# - Resource not found Face API 1.0 -

for love of life can not figure out why jason format ways wrong , using microsoft face api 1.0 create person within group

here code

protected async void btnaddfaces_click(object sender, eventargs e) {         var client = new httpclient();         var querystring = httputility.parsequerystring(string.empty);         string persongroupid = txtfriendlist.text.tolower();         string persons = txtfriendname.text.tolower();         // request headers         client.defaultrequestheaders.add          ("ocp-apim-subscription-key", "{yourkey}");          // request parameters          var uri = "https://westus.api.cognitive.microsoft.com/face/v1.0/          persongroups/wowlist/persons?" + querystring;         // httpresponsemessage response;         // not sure think here problem          string body = "{\"name\":\"" + "waheed" + "," + "\"}";         // request body         using (var content = new stringcontent         (body, encoding.utf8, "application/json"))         {              await client.putasync(uri, content)                 .continuewith(async responsetask =>                 {                     var responsebody = await responsetask.result                     .content.readasstringasync();                     txtfacelist.text = responsebody.tostring();                  });         }// end of using statement  } 

what should happen http verb status ok 200 should return ,

{ "error": { "code": "resourcenotfound", "message": "the requested resource not found." } }  

i @ previous post apply same approach , not work. can point me correct direction other jumping off roof.

thanks

you have wrong http verb. in case want use post, not put. therefore need change client call like:

await client.postasync(uri, content)     .continuewith(async responsetask =>     {         var responsebody = await responsetask.result.content.readasstringasync();         txtfacelist.text = responsebody.tostring();     });