Playing around with functional features of C# to get concise code. This style does not feel so idiomatic, though.

gistfile1.cs

OpenReadCompletedEventHandler GetGenericOpenHandler<T>(ObservableCollection<T> destination, Func<XElement, IEnumerable<T>> elementQuery)
{
    return (object sender, OpenReadCompletedEventArgs e) =>
    {
        XElement xmlResult = this.GetXmlResult(e);
        foreach (T result in elementQuery(xmlResult))
        {
            destination.Add(result);
        }
    };
}

private XElement GetXmlResult(OpenReadCompletedEventArgs e)
{
    XmlReaderSettings settings = new XmlReaderSettings();
    settings.DtdProcessing = DtdProcessing.Ignore;
    XmlReader reader = XmlReader.Create(e.Result, settings);
    return XElement.Load(reader);
}

// Ja sitten voi tehdä jokaiselle feedille mitä on:

this.LoadFeedByName("results",
    this.GetGenericOpenHandler(Results,
    (XElement xmlResult) =>
    {
        return from result in xmlResult.Descendants("game")
                select new ResultModel
                {
                    Away = result.Element("team_home").Value.Trim(),
                    Home = result.Element("team_away").Value.Trim(),
                    Scores = result.Element("scores").Value.Trim(),
                    GameDate = DateTime.Parse(
                        new Func<string>(() =>
                        {
                            string[] date_parts = result.Parent.Attribute("date").Value.Trim().Split('.');
                            return date_parts[2] + "/" + date_parts[1] + "/" + date_parts[0]; 
                        })())
                };
    }));