private void LoadFile(string FileName)
{
var serializer = new XmlSerializer(typeof(Facet));
var stream = new FileStream(FileName, FileMode.Open);
m_Facet = (Facet)serializer.Deserialize(stream);
stream.Close();
tCat.BeginUpdate();
tCat.Nodes.Clear();
m_FacetNode = m_Facet.GetTreeNode("Facet");
tCat.Nodes.Add(m_FacetNode);
tCat.SelectedNode = m_FacetNode;
tCat.EndUpdate();
}