System.Xml.Xsl.Runtime.XmlQueryRuntime.SyncToNavigator C# (CSharp) Method

        internal static XPathNavigator SyncToNavigator(XPathNavigator navigatorThis, XPathNavigator navigatorThat) {
            if (navigatorThis == null || !navigatorThis.MoveTo(navigatorThat))
                return navigatorThat.Clone();

            return navigatorThis;
        }
    }

 public void Create(XPathNavigator input, XmlNavigatorFilter filter)
 {
     // Save input node as current node
     _navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
     _filter     = filter;
     _needFirst  = true;
 }