nominatim encoding

Could you give some examples (of the code that fails, the data that you're expecting, and the data that you get back)?

Of course. For example this request http://nominatim.openstreetmap.org/reverse?format=xml&lat=50,9683209807591&lon=2,57099452814137&zoom=18&addressdetails=1

The result: D 70, farm, Bettencourt-Rivière, Amiens, Somme, Picardía, Francia metropolitana, 80890, Francia

But in my C# code

public string Inversa(double latitud, double longitud) { WebClient webClient = new WebClient();

        try
        {

            string cadena = "http://nominatim.openstreetmap.org/reverse?format=xml&lat=" + Convert.ToString(latitud) + "&lon=" + Convert.ToString(longitud) + "&zoom=18&addressdetails=1";

            string result = webClient.DownloadString(cadena);

            return result;
        }
        catch (Exception e)
        {
            throw e;
        }
    }

I get: D 70, farm, Bettencourt-Rivière, Amiens, Somme, Picardie, France métropolitaine, 80890, France

Thanks