Here is good article on why not to return DataSet from a webmethod.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnservice/html/service02112003.asp


>Bonnie,
>What's the difference? Passing a dataset you're already passing an XML,no?
>Cetin
>
>>Stephen,
>>
>>I don't recommend passing a DataSet to or from a WebService. Use an XML string instead. It's easy enough to serialize/deserialize a DataSet to/from XML.
>>
>>~~Bonnie
>>
>>