I get xml by url, how can I save the content into a new xml file, so that the structure is not broken?

Question

.NET

When I do this, the structure is broken

WebRequest request = WebRequest.Create(@"http://xml.weather.co.ua/1.2/forecast/27?dayf=5&userid=fdsf_com_ua&lang=ru");
      using (var response = request.GetResponse())
      {
        using (var stream = response.GetResponseStream())
        {
          if (stream != null)
            using (
              var reader = new StreamReader(stream))
            {
              //это для считывания xml файла
              using (var writer = new StreamWriter("weather.xml", false))
              {
                writer.Write(reader.ReadToEnd());
              }
            }
        }
      }

When so, nothing is written

WebRequest request1 = WebRequest.Create(@"http://xml.weather.co.ua/1.2/forecast/27?dayf=5&userid=fdsf_com_ua&lang=ru");
      using (var response = request1.GetResponse())
      {
        using (var stream = response.GetResponseStream())
        {
          if (stream != null)
            using (
              var reader = new XmlTextReader(stream))
            {
              //это для считывания xml файла
              using (var writer = new XmlTextWriter("weather1.xml", Encoding.UTF8))
              {
                writer.WriteString(reader.ReadString());
              }
            }
        }
      }

Answer 1

According to the first option - what does "the structure is broken" mean? It should not be broken during character-by-character copying. However, there may be problems with encodings. The required encoding must be determined either by ContentType - or by the xml declaration.
According to the second option - of course, this should not work. Read the documentation for what ReadString does.
--
Now how to save xml. The first option is just byte by byte. Use stream directly without wrapping it in a StreamReader - and use a FileStream for writing.
The second option is to load the stream into an XmlDocument or XDocument of your choice, and then save it.