var httpClient = new HttpClient();
var result = httpClient.GetAsync(url).Result;
var stream = result.Content.ReadAsStreamAsync().Result;
XmlDocument xml = new XmlDocument();
xml.Load(stream);
var node = xml.GetElementsByTagName("Title");
List<string> titles = new List<string>();
for (int i = 0; i < node.Count; i++)
{
    xml = new XmlDocument();
    xml.LoadXml(node[i].OuterXml);
    titles.Add(xml.InnerText);
}