private void toolStripMenuItemInsertEntity_Click(object sender, EventArgs e)
{
TreeNode tnParent = this.treeView.SelectedNode;
DocSchema docSchema = (DocSchema)tnParent.Tag;
DocEntity docEntity = new DocEntity();
InitDefinition(docEntity);
docSchema.Entities.Add(docEntity);
this.treeView.SelectedNode = this.LoadNode(tnParent.Nodes[1], docEntity, null, true);
toolStripMenuItemEditRename_Click(this, e);
}