public JsonResult OpportunityActivities(int OpportunityID)
{
List <ListItemViewModel> load = new List <ListItemViewModel>();
load = ListItemService.OpportunityActivities(OpportunityID).Result.Select(x => new ListItemViewModel()
{
Id = x.Id,
Value = x.Value
}).ToList();
return(Json(load, JsonRequestBehavior.AllowGet));
}