Rally Rest API .NET Toolkit Creating Defect/User Story with Tags -

i'm having trouble creating new defect or user story tag included. i've tried few different ways, , typically defect created in rally, no tags attached. looking @ rally api , source code toolkit, seems tags should in arraylist. here latest attempt. if can point me in right direction, appreciate it.

dynamicjsonobject itemtocreate = new dynamicjsonobject(); itemtocreate["project"] = project["_ref"];  arraylist taglist = new arraylist();  dynamicjsonobject mytag = new dynamicjsonobject(); mytag["_ref"] = "/tag/1435887928";  taglist.add(mytag); itemtocreate["tags"] = taglist; createresult itemtocreateresult = restapi.create(workspace["_ref"], "defect", itemtocreate); 

you there:

 arraylist taglist = new arraylist();  dynamicjsonobject mytag = new dynamicjsonobject();  mytag["_ref"] = "/tag/2222";  taglist.add(mytag);  mystory["tags"] = taglist;  updateresult = restapi.update(createresult.reference, mystory); 

this code creates user story, finds tag based on ref , adds tag story:

using system; using system.collections.generic; using system.collections; using system.linq; using system.text; using rally.restapi; using rally.restapi.response;  namespace rest_v2._0_test {     class program     {         static void main(string[] args)         {             //initialize rest api             rallyrestapi restapi;             restapi = new rallyrestapi("user@co.com", "secret", "https://rally1.rallydev.com", "v2.0");              //set our workspace , project scopings             string workspaceref = "/workspace/11111"; //replace oid oid of workspace              //create item             dynamicjsonobject mystory = new dynamicjsonobject();             mystory["name"] = "abcdefg11";             createresult createresult = restapi.create(workspaceref, "hierarchicalrequirement", mystory);             dynamicjsonobject s = restapi.getbyreference(createresult.reference, "formattedid");             console.writeline(s["formattedid"]);              mystory["description"] = "this story.";             operationresult updateresult = restapi.update(createresult.reference, mystory);              arraylist taglist = new arraylist();             dynamicjsonobject mytag = new dynamicjsonobject();             mytag["_ref"] = "/tag/2222";             taglist.add(mytag);              //update item              mystory["tags"] = taglist;             updateresult = restapi.update(createresult.reference, mystory);         }     } }