DataTable distinctTable = dTable.DefaultView.ToTable(true,\"ITEM_NO\",\"ITEM_STOCK\"); DataTable dtSummerized = new DataTable(\"SummerizedResult\"); dtSummerized.Co
You might try this:
dTable.Compute("sum([" + TotalItem + "])","");
I.e enclose your column name in square brackets [ ]
The idea is from this post.