System.FormatException: Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) at System.Number.ParseDecimal(String value, NumberStyles options, NumberFormatInfo numfmt) at System.Convert.ToDecimal(String value) at Hymns.Bookshop.Business.DataAccess.GetSearchResult(ScoreDoc result, Searcher searcher, Boolean userIsFriend) at Hymns.Bookshop.Business.DataAccess.GetRelatedProductsByCategoryWithProductID(Int32 productId, Int32 imprintId, Int32 numberOfRecords, Boolean userIsFriend) at Hymns.Bookshop.Website.usercontrols.ProductDisplay.InitialiseControl(Boolean hideDetails)