public void Delete(TODOViewModel input)
 {
     List<string> temp = (List<string>)HttpContext.Current.Session["TODOList"];
     temp.Remove(input.Task);
     HttpContext.Current.Session["TODOList"] = temp;
     HttpContext.Current.Response.Redirect("../../");
 }
 public void Add(TODOViewModel model)
 {
     List<string> temp = (List<string>)HttpContext.Current.Session["TODOList"];
     string newTodo = model.Task;
     if (temp != null)
     {
         if (temp.Contains(newTodo))
             newTodo = model.Task;
         else
             temp.Add(model.Task);
         HttpContext.Current.Session.Add("TODOList", temp);
     }
     HttpContext.Current.Response.Redirect("../../");
 }
 public TODOViewModel Get(TODOViewModel input)
 {
     return input;
 }