static void writeTree(XmlNode xmlElement, int level) {
  String levelDepth = "";
  for(int i=0;i<level;i++) 
  {
   levelDepth += "  ";
  }
  Console.Write("\n{0}<{1}",levelDepth,xmlElement.Name);
  XmlAttributeCollection xmlAttributeCollection = xmlElement.Attributes;
  foreach(XmlAttribute x in xmlAttributeCollection) 
  {
   Console.Write(" {0}='{1}'",x.Name,x.Value);
  }
  Console.Write(">");
  XmlNodeList xmlNodeList = xmlElement.ChildNodes;
  ++level;
  foreach(XmlNode x in xmlNodeList) 
  {
   if(x.NodeType == XmlNodeType.Element) 
   {
     writeTree((XmlNode)x, level);
   }
   else if(x.NodeType == XmlNodeType.Text) 
   {
     Console.Write("\n{0}  {1}",levelDepth,(x.Value).Trim());
   }
  }
  Console.Write("\n{0}</{1}>",levelDepth,xmlElement.Name);
}