update visual recognition parameters and add update check to example

Author: mediumTaj

examples/IBM.WatsonDeveloperCloud.VisualRecognition.v3.Example/VisualRecognitionServiceExample.cs

@@ -22,6 +22,7 @@
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
+using Newtonsoft.Json;
 
 namespace IBM.WatsonDeveloperCloud.VisualRecognition.v3.Example
 {
@@ -62,6 +63,10 @@ public VisualRecognitionServiceExample(string apikey)
             IsClassifierReady(_createdClassifierId);
             autoEvent.WaitOne();
             UpdateClassifier();
+            IsClassifierReady(_createdClassifierId);
+            autoEvent.WaitOne();
+            ClassifyWithClassifier();
+            GetClassifiersVerbose();
             DeleteClassifier();
 
             Console.WriteLine("\n\nOperation complete");
@@ -99,6 +104,18 @@ private void ClassifyPost()
             }
         }
 
+        private void ClassifyWithClassifier()
+        {
+            string[] classifierIDs = { _createdClassifierId };
+            using (FileStream fs = File.OpenRead(_localGiraffeFilePath))
+            {
+                Console.WriteLine(string.Format("\nCalling Classify(\"{0}\")...", _localTurtleFilePath));
+                var result = _visualRecognition.Classify((fs as Stream).ReadAllBytes(), Path.GetFileName(_localTurtleFilePath), "image/jpeg", classifierIDs: classifierIDs);
+
+                Console.WriteLine(JsonConvert.SerializeObject(result, Formatting.Indented));
+            }
+        }
+
         private void DetectFacesGet()
         {
             Console.WriteLine(string.Format("\nCalling DetectFaces(\"{0}\")...", _faceUrl));

src/IBM.WatsonDeveloperCloud.VisualRecognition.v3/VisualRecognitionService.cs

@@ -151,7 +151,7 @@ public ClassifyPost Classify(byte[] imageData = null, string imageDataName = nul
                 {
                     var parametersContent = new StringContent(parameters, Encoding.UTF8, HttpMediaType.TEXT_PLAIN);
                     parametersContent.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
-                    formData.Add(parametersContent);
+                    formData.Add(parametersContent, "parameters");
                 }
 
                 result = this.Client.PostAsync($"{ this.Endpoint}{PATH_CLASSIFY}")