c# - Trying to bind GridView from Linq -

so have dataset populated xml file, i'm trying populate gridview using linq. gridview rendering empty. here code-behind...

protected void page_load(object sender, eventargs e) {     linqsamples samples = new linqsamples(gvnumbers, this.page);     samples.datasetlinq40(); }  private class linqsamples {     private dataset testds;     private gridview _gv;     private page _pg;      public linqsamples(gridview gv, page pg)     {         testds = testhelper.createtestdataset(pg);         _gv = gv;         _pg = pg;     }      public void datasetlinq40()     {         var numbers = testds.tables["numbers"].asenumerable();          //var numbergroups = n in numbers         //                   group n n.field<int>("number") % 5 g         //                   select new { remainder = g.key, numbers = g };          //var justnums = n in numbers         //              select n;         _gv.datasource = justnums;         _gv.databind();     } }  internal static dataset createtestdataset(page pg) {     dataset ds = new dataset();     // customers table     ds.tables.add(createnumberstable());      ds.acceptchanges();     return ds; }  private static datatable createnumberstable() {     int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };     datatable table = new datatable("numbers");     table.columns.add("number", typeof(int));     foreach (int n in numbers)     {          table.rows.add(new object[] { n });     }     return table; } 

...and .aspx page...

<asp:gridview id="gvnumbers" runat="server" autogeneratecolumns="false"> </asp:gridview> 

neither numbergroups nor justnums works, both result in empty gridview.