Using xPathNav.Compile, its returning a node set how can I access the nodeset C# 2005?

Using xPathNav.Compile, its returning a node set  how can I access the nodeset C# 2005?

               When xpathExpr.ReturnType = XPathResultType.NodeSet

how do I access the properties of this node set

object functionReturnValue = xPathNav.Select(xpathExpr);

ie does not return what i want as i just want the node not a XPathNavigator

public object GetXpath(XmlNode node, string xPath)
        {
            object functionReturnValue = null;
            string errorMsg = "TransmitMessage::XPath expression {0} is invalid. " + xPath;
            try {                
                XPathNavigator xPathNav = node.CreateNavigator();
                XPathExpression xpathExpr = xPathNav.Compile(xPath);
 
                 switch (xpathExpr.ReturnType)
                {
 
                    case XPathResultType.Boolean:
                        functionReturnValue = xPathNav.Evaluate(xpathExpr);
                        break;
                    case XPathResultType.String:
                        functionReturnValue = xPathNav.Evaluate(xpathExpr);
                        break;
                    case XPathResultType.Number:
                        functionReturnValue = xPathNav.Evaluate(xpathExpr);
                        break;
                    case XPathResultType.NodeSet:
                        // how do I access this nodeset
                        functionReturnValue = xPathNav.Select(xpathExpr);
                        break;
                    case XPathResultType.Error:
                        GenericLogger.ErrorLog(errorMsg);
                        functionReturnValue = errorMsg;
                        throw new Exception(errorMsg);
                    default:
                        functionReturnValue = errorMsg;
                        throw new Exception(errorMsg);
                }
 
            }
 
 
 
 
 
            catch (Exception exp)
            {
 
                functionReturnValue = exp.Message + " " + errorMsg;
                GenericLogger.ErrorLog(_userName, _machineName, errorMsg);
                throw new Exception(errorMsg);
 
            }
            
            return functionReturnValue;
 
        }

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