how can i parse my this xml string

XmlTextReader r = new XmlTextReader("xml file path");
string strval1,strval2,strval3;
r.Read();
while (r.Read())
{
  if (r.NodeType == XmlNodeType.Element)
  {
   if (r.Name =="subscreiptionid" )
   {
    r.Read();
    strval1 = Convert.ToString(r.Value);
   }
   elseif(r.Name =="domain" )
   {
    r.Read();
    strval2 = Convert.ToString(r.Value);
   }
   elseif(r.Name =="channel" )
   {
    r.Read();
    strval3 = Convert.ToString(r.Value);
   }
  }
}

XmlDocument chanelData= new XmlDocument();
chanelData.LoadXml(@"<channeldata>
                    <subscriptionid>subid</subscriptionid>
                    <domain>todomian</domain>
                    <channel>tochannel</channel>
                </channeldata>");
foreach (XmlNode node in chanelData.SelectNodes("/channeldata/*"))
    Console.WriteLine(node.Name + " = " +node.InnerText);

Console.ReadKey();