Global.asax

<%@ Application Language="C#" %>

<script RunAt="server">

	void Application_Start(object sender, EventArgs e)
	{
		SiteMap.SiteMapResolve += new SiteMapResolveEventHandler(AppendQueryString);
	}

	SiteMapNode AppendQueryString(object o, SiteMapResolveEventArgs e)
	{
		if (SiteMap.CurrentNode != null)
		{
			SiteMapNode temp;
			temp = SiteMap.CurrentNode.Clone(true);
			Uri u = new Uri(e.Context.Request.Url.ToString());
			temp.Url += u.Query;

			if (temp.ParentNode != null)
				temp.ParentNode.Url += u.Query;

			return temp;
		}

		return null;
	}
	
</script>