SAP .Net Connector retults: ?0100000000000000001

When I query a data using the SAP .NET Connector in one of my column of my table I received wrong data like:

?0100000000000000001

?0100000000000000002

?0100000000000000003

?0100000000000000004

If i query the data using the SAP GUI I received correct data

Could somebody help me?

Thanks,

SHigueru.