public async System.Threading.Tasks.Task <string> ValidateWorkItemStateAsync()
        {
            string result      = "";
            string bodycontent = await Request.Content.ReadAsStringAsync();

            JObject wit = JObject.Parse(bodycontent);

            var resource    = wit["resource"];
            var workItemId  = resource["workItemId"];
            var fieldStatus = resource["fields"].Where(t => t.ToString().Contains("System.State")).SingleOrDefault();

            var oldValue = fieldStatus.Values("oldValue").Select(t => (string)t).SingleOrDefault();
            var newValue = fieldStatus.Values("newValue").Select(t => (string)t).SingleOrDefault();

            if (!IsValidStated(oldValue, newValue))
            {
                WorkItemManager aux = new WorkItemManager();
                aux.ReassignState(workItemId.ToString(), oldValue);
            }
            return(result);
        }