[System.Xml.Serialization.XmlElementAttribute("Sources", typeof(SourcesInfo))]
public object[] Items {
    get {
        return this.itemsField;
    }
    set {
        this.itemsField = value;
    }
}

public ReportInfo GetReport(string id)
{
    ReportInfo report = null;

    if (GlobalVariables.Reports.ContainsKey(id))
    {
        var serializer = new XmlSerializer(typeof(ReportInfo));

        var reader = new IO.StreamReader(GlobalVariables.Reports[id]);
        report = (ReportInfo)serializer.Deserialize(reader);
        reader.Close();
    }
    else
        GlobalVariables.Log.Info($"Не удалось загрузить отчет '{id}'");

    return report;
}

public object[] Items

public SourcesInfo[] Items