public override void InsertAndDeleteParagraphBreak()
{
StTxtPara para0 = m_text1.ContentsOA.ParagraphsOS[0] as StTxtPara;
TextBuilder tb = new TextBuilder(m_rtp.TextBuilder);
tb.SelectNode(para0, 1);
XmlNode newParaNodeAfterInsert = tb.InsertParagraphBreak(para0, tb.SelectedNode);
m_rtp.AddResultingAnnotationState(newParaNodeAfterInsert);
tb.DeleteParagraphBreak(para0);
tb.SelectNode(para0, 1);
XmlNode paraNodeAfterEdit = tb.SelectedNode;
m_rtp.AddResultingAnnotationState(paraNodeAfterEdit);
base.InsertAndDeleteParagraphBreak();
}