System.ArgumentException: Input string was not in a correct format.Couldn't store <> in sconto Column.  Expected type is Decimal. ---> 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, IFormatProvider provider)
   at System.Data.Common.DecimalStorage.Set(Int32 record, Object value)
   at System.Data.DataColumn.set_Item(Int32 record, Object value)
   --- End of inner exception stack trace ---
   at System.Data.DataColumn.set_Item(Int32 record, Object value)
   at System.Data.DataRow.set_Item(DataColumn column, Object value)
   at _prodotti.getProdottiCorrelati(String item_id) in c:\inetpub\wwwroot\franzasas\prodotti.aspx.cs:line 1033