Remove the child node from selected parent but not grand children

anyone please help me to remove inner xml tag where i want to delete fn-group and fn id tag but i want its child p , p and emphasis tag should be retained

here is my sample xml file

     <table-wrap-foot>
     <fn-group type="footnotes">
     <fn id="c89520-1-12">
     <p>
     <emphasis type="italic">Note</emphasis>:
     In 1300, of the twenty-two cities in Italy that had populations over 20,000.
     </p>
     </fn>
     </fn-group>
     </table-wrap-foot>
     </table-wrap>

here is my C# code

        XmlDocument myXmlDocument = new XmlDocument();
        myXmlDocument.Load("sample.xml");
        XmlNodeList xmlnode = myXmlDocument.GetElementsByTagName("table-wrap-foot");

        for (int i = 0; i < xmlnode.Count; i++)
         {
             if(xmlnode[i].InnerXml.Contains("<label>"))
             {  
             }
             else
             {
                 #here i want to delete //fn-group and fn but not p tag
             }
             }
        myXmlDocument.Save("sample.xml");

where i want to delete fn-group and fn id tag but i want its child p , p and emphasis tag should be retained here is my sample xml file

Thanks Appu