fix(AssistantV2): Fixed serialization of MessageRequest data

Author: mediumTaj

Scripts/Services/Assistant/v2/Assistant.cs

@@ -20,6 +20,7 @@
 using IBM.Watson.DeveloperCloud.Logging;
 using IBM.Watson.DeveloperCloud.Utilities;
 using IBM.WatsonDeveloperCloud.Assistant.v2;
+using MiniJSON;
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -397,20 +398,14 @@ public bool Message(SuccessCallback<MessageResponse> successCallback, FailCallba
                 }
             }
 
-            IDictionary<string, string> requestDict = new Dictionary<string, string>();
-            int iterator = 0;
-            StringBuilder stringBuilder = new StringBuilder("{");
-            foreach (KeyValuePair<string, string> property in requestDict)
+            if (request != null)
             {
-                string delimeter = iterator < requestDict.Count - 1 ? "," : "";
-                stringBuilder.Append(string.Format("\"{0}\": {1}{2}", property.Key, property.Value, delimeter));
-                iterator++;
+                fsData data = null;
+                _serializer.TrySerialize(request, out data);
+                string json = data.ToString().Replace('\"', '"');
+                req.Send = Encoding.UTF8.GetBytes(json);
             }
-            stringBuilder.Append("}");
 
-            string stringToSend = stringBuilder.ToString();
-
-            req.Send = Encoding.UTF8.GetBytes(stringToSend);
             req.Headers["Content-Type"] = "application/json";
             req.Parameters["version"] = VersionDate;
             req.OnResponse = OnMessageResponse;