Private void btnExportWord_Click_1(Object sender, EventArgs e)
{
  Object oMissing = Missing.Value;
  Word.Application oWord = New Word.Application();
  Word.Document oWordDoc = New Word.Document();
  oWord.Visible = false;
  oWordDoc = oWord.Documents.Add(ref oMissing, ref oMissing, ref oMissing, ref oMissing);
  Object oTemplatePath = @"C:\test\MyXMLTemplate.dotx";
  oWordDoc = oWord.Documents.Add(ref oTemplatePath, ref oMissing, ref oMissing, ref oMissing);
  For (int i = 0; i < treeViewXMLFiles.Nodes[0].Nodes.Count; i++)
  {
    oWord.Characters.Last.InsertParagraphAfter;
    oWord.Characters.Last.InsertAfter treeViewXMLFiles.Nodes[0].Nodes[i].Text;
    oWord.Characters.Last.InsertParagraphAfter;
    oWord.Characters.Last.InsertAfter treeViewXMLFiles.Nodes[0].Nodes[i].Nodes[0].Text;
    oWord.Characters.Last.InsertParagraphAfter;
    oWord.Characters.Last.InsertAfter treeViewXMLFiles.Nodes[0].Nodes[i].Nodes[1].Text;
    oWord.Characters.Last.InsertParagraphAfter;
    oWord.Characters.Last.InsertAfter treeViewXMLFiles.Nodes[0].Nodes[i].Nodes[2].Text; 
    oWord.Characters.Last.InsertParagraphAfter;
  }
  Object oSaveAsFile = (Object)@"C:\test\FINISHED_XML_Template.doc";
  oWordDoc.SaveAs(ref oSaveAsFile, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing);
  oWordDoc.Close(False, ref oMissing, ref oMissing);
  oWord.Quit(ref oMissing, ref oMissing, ref oMissing);
}