linq data sorted

Below codes is to return .net datatable, and I use asp.net repeater to bind it. everything is working except the list does not sort by date and time. The data source starts from query3.

Not sure why. and hope some experts can help out.

Thanks

var query3 = query1.Concat(query2).OrderBy(z => z.DateTimeSent);

           


             

public static DataTable GetConversation(string sid, string token,string accountPhoneNo, string twilioPhoneNo)
        {  
            string clientPhoneNo = string.Empty;
            string inputFilePath = filePathUserMessagesAll;
            DataTable dt = new DataTable();
            dt.Clear();
            dt.Columns.AddRange(new DataColumn[]
           {
                new DataColumn("Body",typeof(string)),
                new DataColumn("DateCreated",typeof(string)),
                new DataColumn("Direction",typeof(string)),
                new DataColumn("SelectedPhoneNo",typeof(string))
           });
            XDocument xdoc = null;
            using (XmlReader xr = XmlReader.Create(inputFilePath))
            {
                xdoc = XDocument.Load(xr);
                var query1 = from t in xdoc.Descendants("User")
                             where 
                             (
                             t.Element("From").Value.ToLower() == "+1" + accountPhoneNo.ToLower()
                             ) //client phone
                             select new
                             {
                                 Body = t.Element("Body").Value,
                                 DateTimeSent = t.Element("DateTimeSent").Value,
                                 Direction = t.Element("Direction").Value,
                                 To = t.Element("To").Value
                             };
                var query2 = from t in xdoc.Descendants("User")
                             where t.Element("To").Value.ToLower() == "+1" + accountPhoneNo.ToLower()
                             select new
                             {
                                 Body = t.Element("Body").Value,
                                 DateTimeSent = t.Element("DateTimeSent").Value,
                                 Direction = t.Element("Direction").Value,
                                 To = t.Element("From").Value 
                             };
                var query3 = query1.Concat(query2).OrderBy(z => z.DateTimeSent);
                foreach (var x in query3)
                {
                    dt.Rows.Add(x.Body,(DateTime.Parse(x.DateTimeSent)).ToString("MM/dd/yy h:mm", System.Globalization.CultureInfo.InvariantCulture),x.Direction,accountPhoneNo);
                }System.Globalization.CultureInfo.InvariantCulture);
                xr.Close();
                return dt;
            }
        }
       

Select allOpen in new window