System.XML NameSpace in c#

Hi All,

I'm very new to the world of Dot Net. I am trying to convert a code written in C# (Dot Net Beta 1) to Dot Net Beta 2. The problem is Beta 1 code used System.Xml.XmlNavigator class for traversing an XML file. The build which I have got is Beta 2(version 7.0.9219). This build does not seem to support System.Xml.XmlNavigator class. I could not find any class which can give me all the functionalities of XmlNavigator, except XmlNode, which I could use.
Here XmlNode class property, "HasChildNodes" return TRUE even if the node does not have a child node.

Please help me by providing a way to correct this problem or find a substitue for XmlNavigator class.