Show xml code in page

I am trying to generate an API who returns info in xml format. When using the proper URL the XmlDocument is being generated properly but I have problems to show it and send it back. For example in http://ift.tt/JqqdUC if I select a place I get the info and I can see it in the browser in a nice XML document.

<GeocodeResponse>
<status>OK</status>
<result>
<type>street_address</type>
<formatted_address>277 Bedford Avenue, Brooklyn, NY 11211, EE. UU.</formatted_address>
<address_component>
<long_name>277</long_name>
<short_name>277</short_name>
<type>street_number</type>
</address_component>
<address_component>
<long_name>Bedford Avenue</long_name>
<short_name>Bedford Ave</short_name>
<type>route</type>
</address_component>
<address_component>
<long_name>Williamsburg</long_name>
<short_name>Williamsburg</short_name>
<type>neighborhood</type>
<type>political</type>
</address_component>
<address_component>
<long_name>Brooklyn</long_name>
<short_name>Brooklyn</short_name>
<type>sublocality_level_1</type>
<type>sublocality</type>
<type>political</type>
</address_component>
<address_component>
<long_name>Kings County</long_name>
<short_name>Kings County</short_name>
<type>administrative_area_level_2</type>
<type>political</type>
</address_component>
<address_component>
<long_name>New York</long_name>
<short_name>NY</short_name>
<type>administrative_area_level_1</type>
<type>political</type>
</address_component>
<address_component>
<long_name>Estados Unidos</long_name>
<short_name>US</short_name>
<type>country</type>
<type>political</type>
</address_component>
<address_component>
<long_name>11211</long_name>
<short_name>11211</short_name>
<type>postal_code</type>
</address_component>
<geometry>
<location>
<lat>40.7142320</lat>
<lng>-73.9612889</lng>
</location>
<location_type>ROOFTOP</location_type>
<viewport>
<southwest>
<lat>40.7128830</lat>
<lng>-73.9626379</lng>
</southwest>
<northeast>
<lat>40.7155810</lat>
<lng>-73.9599399</lng>
</northeast>
</viewport>
</geometry>
<place_id>ChIJd8BlQ2BZwokRAFUEcm_qrcA</place_id>
</result>

This is exactly what I want to make. I tried using the following once I generate the Xml document:

        Response.ContentType = "text/xml"; //must be 'text/xml'
        Response.ContentEncoding = System.Text.Encoding.UTF8; //we'd like UTF-8
        XmlDoc.Save(Response.Output);

The result is not appearing and if I check in the browser console I see the following:

<car Acrisscode="XVDMR" Description="&lt;![CDATA[]]&gt;" Capacity="5" Price="199,5" IncludedDistance="0" IncludedDistanceUnit="K" IncludedDistanceType="D" ExtraDistancePrice="0.15" AptTax="0" AppTaxIncluded="U" YoungDrvFee="0" YoungDrvFeeIncluded="Y" FuelPolicy="U" Supplier="Social Car" Pickup="&lt;![CDATA[Carrer John Lennon]]&gt;" Dropoff="&lt;![CDATA[Carrer John Lennon]]&gt;" Image="/9_13_perfil.jpg" Deep_link="&lt;![CDATA[Carrer John Lennon]]&gt;"/>

And also the following:

        var stringWriter = new StringWriter();
        var xmlTextWriter = XmlWriter.Create(stringWriter);
        XmlDoc.WriteTo(xmlTextWriter);
        xmlTextWriter.Flush();
        string result = stringWriter.GetStringBuilder().ToString();
        saveText.Text = result; //saveText is the ID of a Label

But the result is still the same...

Here is how I created the xml:

        XmlDocument XmlDoc = new XmlDocument();
        XmlDeclaration XmlDecl;
        XmlDecl = XmlDoc.CreateXmlDeclaration("1.0", "UTF-8", "");
        XmlDoc.AppendChild(XmlDecl);

        XmlElement RootElem = XmlDoc.CreateElement("cars");
        XmlDoc.AppendChild(RootElem);

        if (result.Count > 0)
        {
            XmlElement xmlMarker;
            foreach (VehiculoResult item in result)
            {
                if (!(int.Parse(driver_age) < 21 && item.TipoSeguro == 2))
                {
                    string accris = CreateAccriscode(item);
                    xmlMarker = XmlDoc.CreateElement("car");
                    RootElem.AppendChild(xmlMarker);
                    xmlMarker.SetAttribute("Acrisscode", accris);
                    xmlMarker.SetAttribute("Description", "<![CDATA[" + item.Descripcion + "]]>");
                    xmlMarker.SetAttribute("Capacity", item.NumPlazas.ToString());
                    DateTime fechaInicio = DateTime.Parse(pickup_date + " " + pickup_time);
                    DateTime fechaFin = DateTime.Parse(dropoff_date + " " + dropoff_time);
                    double price = UtilesReserva.ObtenerImporteReserva(TimeSpan.Parse((fechaFin - fechaInicio).ToString()),
                                                         item.PrecioHora, item.PrecioDia,
                                                         item.PrecioSemana, item.PrecioMes);
                    if (item.TipoSeguro == 2)
                    {
                        price += wService.CalcularPrecioSeguro(fechaInicio, fechaFin);
                    }
                    xmlMarker.SetAttribute("Price", price.ToString());
                    if (item.LimitacionKM == 1)
                    {
                        xmlMarker.SetAttribute("IncludedDistance", "250");
                    }
                    else if (item.LimitacionKM == 2)
                    {
                        xmlMarker.SetAttribute("IncludedDistance", "500");
                    }
                    else
                    {
                        xmlMarker.SetAttribute("IncludedDistance", "0");
                    }
                    xmlMarker.SetAttribute("IncludedDistanceUnit", "K");
                    xmlMarker.SetAttribute("IncludedDistanceType", "D");
                    xmlMarker.SetAttribute("ExtraDistancePrice", "0.15");
                    xmlMarker.SetAttribute("AptTax", "0");
                    xmlMarker.SetAttribute("AppTaxIncluded", "U");
                    xmlMarker.SetAttribute("YoungDrvFee", "0");
                    xmlMarker.SetAttribute("YoungDrvFeeIncluded", "Y");
                    xmlMarker.SetAttribute("FuelPolicy", "U");
                    xmlMarker.SetAttribute("Supplier", "Social Car");
                    xmlMarker.SetAttribute("Pickup", "<![CDATA[" + item.Direccion + "]]>");
                    xmlMarker.SetAttribute("Dropoff", "<![CDATA[" + item.Direccion + "]]>");
                    xmlMarker.SetAttribute("Image", item.UrlFotoPerfil);
                    xmlMarker.SetAttribute("Deep_link", "<![CDATA[" + item.Direccion + "]]>");
                }
            }
        }

Anyone knows what I am missing or doing wrong?