private void treeView_AfterSelect(object sender, TreeViewEventArgs e)
{
if (treeView.SelectedNode != null) {
dataGridViewAttributes.Rows.Clear();
foreach (KeyValuePair<string, CAttribute> pair in ((CNode)treeView.SelectedNode.Tag).attributes) {
dataGridViewAttributes.Rows.Add(pair.Key, pair.Value);
}
}
}