System.ArgumentNullException: Value cannot be null. Parameter name: source at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate) at files_controls_similarProducts.GetSimilarLots(Int32 currentItemNo) in D:\Domains\davidduggleby.com\www\live\files\controls\similarProducts.ascx.vb:line 49 at files_controls_similarProducts.Page_Load(Object sender, EventArgs e) in D:\Domains\davidduggleby.com\www\live\files\controls\similarProducts.ascx.vb:line 16