void CodeFirstManager_Invalidating(object sender, InvalidatingEventArgs e)
 {
     TreeControllerBase.TreeNodesRendering -= FilterTreeNodes;
 }
 void CodeFirstManager_Invalidating(object sender, InvalidatingEventArgs e)
 {
     TreeControllerBase.TreeNodesRendering -= FilterTreeNodes;
 }
 void CodeFirstManager_Invalidating(object sender, InvalidatingEventArgs e)
 {
     _eventHandler.Invalidate();
 }