protected virtual void OnExecuting(ExecutingEventArgs e)
        {
            EventHandler <ExecutingEventArgs> handler = Executing;

            if (handler != null)
            {
                handler(this, e);
            }
        }
 protected virtual void OnExecuting(ExecutingEventArgs e)
 {
     EventHandler<ExecutingEventArgs> handler = Executing;
     if (handler != null) handler(this, e);
 }