How to find max date record by id in linq

var myLINQ = gDataset12.Tables[0].AsEnumerable()
            .GroupBy(r=>new {
                  ID = r.Field<int>("ID"),                 //each ID
                  Date = r.Field<datetime>("Date").Date})  //each Day
            .SelectMany(g=> g.Max(r=>.Field<datetime>("Date")) //item in group with max time
            .Select(r=> new {
                        ID = r.Field<int>("ID"),
                        Status = r.Field<int>("Status"),
                        Date = r.Field<datetime>("Date")
                     });

internal class Program
{
    private static void Main()
    {
        DataTable dt = new DataTable("table");

        dt.Columns.AddRange(
            new DataColumn[]
            {
                new DataColumn("ID", typeof (int)),
                new DataColumn("Status", typeof (string)),
                new DataColumn("Date", typeof (DateTime)),

            });

        dt.Rows.Add(NewRow(2706, "Y", "2015-08-27 14:26:25.103", dt));
        dt.Rows.Add(NewRow(2706, "N", "2015-08-27 14:33:42.053", dt));
        dt.Rows.Add(NewRow(2707, "Y", "2015-08-27 14:26:22.227", dt));
        dt.Rows.Add(NewRow(2707, "N", "2015-08-27 14:27:11.000", dt));
        dt.Rows.Add(NewRow(2710, "Y", "2015-08-25 17:07:01.937", dt));
        dt.Rows.Add(NewRow(2710, "N", "2015-08-27 14:16:42.420", dt));
        dt.Rows.Add(NewRow(2710, "Y", "2015-08-27 14:18:56.347", dt));
        dt.Rows.Add(NewRow(2710, "N", "2015-08-27 14:27:07.753", dt));
        dt.Rows.Add(NewRow(2755, "Y", "2015-08-25 17:06:59.210", dt));
        dt.Rows.Add(NewRow(2755, "N", "2015-08-26 11:27:28.643", dt));
        dt.Rows.Add(NewRow(2755, "Y", "2015-08-26 11:27:35.143", dt));
        dt.Rows.Add(NewRow(2755, "N", "2015-08-27 14:16:39.917", dt));
        dt.Rows.Add(NewRow(2755, "Y", "2015-08-27 14:18:53.477", dt));
        dt.Rows.Add(NewRow(2755, "N", "2015-08-27 14:26:49.217", dt));

        new Program().TestId(dt);

    }

    private void TestId(DataTable dt)
    {
         ////////////////////
        // Here is it ^_^ //
       ////////////////////
       var myLinq = dt.AsEnumerable()
        .GroupBy(r=>new {
              ID = r.Field<int>("ID"),               //each ID
              Date = r.Field<DateTime>("Date").Date})//each Day
        .Select(g=> g.OrderByDescending(r=>r.Field<DateTime>("Date")).First() ) //item in group with max time
        .Select(r=> new {
                    ID = r.Field<int>("ID"),
                    Status = r.Field<string>("Status"),
                    Date = r.Field<DateTime>("Date")
        });

       //Result output
       Console.WriteLine("{0}\t{1}\t{2}", "ID","Status","Date");
        myLinq.ToList().ForEach(i =>
        {
            Console.WriteLine("{0}\t{1}\t{2}", i.ID, i.Status, i.Date.ToString("G"));
        });

        Console.Read();
    }


    private static DataRow NewRow(int id, string status, string date, DataTable dt)
    {
        return NewRow(id, status, DateTime.Parse(date), dt);
    }
    private static DataRow NewRow(int id, string status, DateTime date, DataTable dt)
    {
        DataRow dr = dt.NewRow();
        dr["ID"] = id;
        dr["Status"] = status;
        dr["Date"] = date;

        return dr;
    }

}

//The return datatable will look just like the input dt
DataTable result = dt.Clone();

//Loop through the list of anon items and populate the new table
myLinq.ToList().ForEach(a =>
{
    DataRow row = dt.NewRow();
    row["ID"] = a.ID;
    row["Status"] = a.Status;
    row["Date"] = a.Date;
    result.Rows.Add(row);
});

//return the new table
return result;

//The class must be public static
public static class Extensions
  {
      // the method must be public static and use "this [type] [name]" as the first parameter
      public static DataTable ToDataTable<T>(this IOrderedEnumerable<T> source)
      {
          //T could be misleading so return null
          if (source == null)
              return null;

          DataTable result = new DataTable();

          var properties = typeof(T).GetProperties().ToList();

          properties.ForEach(p =>
          {
              DataColumn column = new DataColumn(p.Name,p.PropertyType);
              result.Columns.Add(column);
          });

          //source is empty so return formated datatable
          if (!source.Any())
              return result;

          source.ToList().ForEach(s =>
          {
              DataRow row = result.NewRow();
              properties.ForEach(p =>
              {
                  row[p.Name] = p.GetValue(s);
              });
              result.Rows.Add(row);
          });

          return result;
      }
  }

//Make sure you have a "using" ref for the Extension class
DataTable result = myLinq.ToDataTable();
//return the new table
return result;