public ContentResult CheckUpdates(string id)
        {
            List<string> list = new List<string>();
            var db = new BariumUpdateServerdbDataContext();
 
            var q = from cw in db.ClientWorkers
                    from c in db.Clients
                    from w in db.Workers
                    where cw.ClientId == c.Id
                    where cw.WorkerId == w.Id
                    where c.ClientGuid == id
                    select w.WorkerId;
            var xdoc = new XmlDocument();
            XmlElement elem = xdoc.CreateElement("Workers");
            xdoc.AppendChild(elem);
            XmlElement time = xdoc.CreateElement("LastUpdate");
            XmlText timeValue = xdoc.CreateTextNode(DateTime.Now.ToString());
            elem.AppendChild(time);
            time.AppendChild(timeValue);
            foreach (var i in q)
            {
                list.Add(i);
                foreach (string xelement in list)
                {
                    XmlElement ele = xdoc.CreateElement("Worker");
                    XmlText xTxt = xdoc.CreateTextNode(i);
                    elem.AppendChild(ele);
                    ele.AppendChild(xTxt);
                }
                var q1 = from w in db.Workers
                         where w.WorkerId == i
                         select w.Id;
                foreach (var p in q1)
                {
                    var q2 = (from wp in db.WorkerParameters
                              where wp.Id == p
                              select new { wp.Type, wp.KeyName });
                    foreach (var item in q2)
                    {
                        XmlElement param = xdoc.CreateElement("Paramters");
                        XmlElement paramText = xdoc.CreateElement(item.KeyName);
                        XmlAttribute Type = xdoc.CreateAttribute(item.Type);
                        elem.AppendChild(param);
                        param.AppendChild(paramText);
                        paramText.SetAttributeNode(Type);
                    }
 
                }   
            }
            return Content(xdoc.InnerXml.ToString(), "text/xml");
        }