private void _tree_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
 {
     NodeMouseClick?.Invoke(sender, new NodeMouseClickArgs()
     {
         Node = e.Node.Tag as ITreeNode
     });
 }
 private void PictureBox1_MouseClick(object sender, MouseEventArgs e)
 => NodeMouseClick?.Invoke(this, e);
 private void Label1_MouseClick(object sender, MouseEventArgs e)
 => NodeMouseClick?.Invoke(this, e);