XML : Bad Encoding when receiving response from HttpClient in UWP

I am making uwp(Universal Windows Platform) application and want to deserialize this xml: http://radioa24.info/ramowka.php to object, but I got instead for scpecial characters as ł, ó some strange letters and special ones like: \n and \r: "Ä…"=>"ą" "ć"=>"ć" "Ä™"=>"ę" For example instead of Poniedziałek i got PoniedziaÅ\u0082ek

My code:

  var httpClient = new HttpClient();  var response = await httpClient.GetAsync(uri).AsTask();  response.EnsureSuccessStatusCode();  var result = await httpResponse.Content.ReadAsStringAsync();    

I was trying to make some Encoding convertions but nothing worked out. How to solve it because later I want to got my object?

  var reader = new XmlSerializer(typeof(Sources.Schedule));  using (var tr = new MemoryStream(Encoding.UTF8.GetBytes(resultString)))  {     Schedule = (Sources.Schedule)reader.Deserialize(res);  }