private void InstanceOnAtmlObjectNameChanged( object sender, AtmlNameChangedEventArgs atmlNameChangedEventArgs )
{
string oldName = atmlNameChangedEventArgs.OldName;
string newName = atmlNameChangedEventArgs.NewName;
//LoadTree();
TreeNode node = FindNodeByFileName( testSetNavigationTree.Nodes, oldName );
TreeNode parent = node.Parent;
var fi = node.Tag as FileInfo;
node.Remove();
AddNode( parent, new FileInfo( Path.Combine( fi.DirectoryName, newName ) ) );
testSetNavigationTree.SelectedNode = node;
}