private void toolStripMenuItemInsertPropertyConstant_Click(object sender, EventArgs e)
{
TreeNode tnParent = this.treeView.SelectedNode;
DocPropertyEnumeration docEnum = (DocPropertyEnumeration)tnParent.Tag;
DocPropertyConstant docConst = new DocPropertyConstant();
docEnum.Constants.Add(docConst);
this.treeView.SelectedNode = this.LoadNode(tnParent, docConst, docConst.ToString(), false);
toolStripMenuItemEditRename_Click(this, e);
}