DataContractException in hosted WCF service - wcf

Question

I am trying a host a service where there is a method that returns the following type:
[DataContract]
[Obfuscation(ApplyToMembers = true, Exclude = true)]
[Serializable]
public class Output
{
[DataMember]
public DataSet dsOutput{get;set;}
}
The method signature is as follows:
[OperationContract]
[WebGet]
function Output matchData(DataSet pDSSide1,DataSet pDSSide2)
{
return new Output();
}
On browsing the service I encounter the following exception:
System.InvalidOperationException: An exception was thrown in a call to a WSDL export extension:System.ServiceModel.Description.DataContractSerializerOperationBehavior
contract: http://tempuri.org/:TesterTool ---->
System.Runtime.Serialization.InvalidDataContractException: Type 'System.Data.DataRow' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. If the type is a collection, consider marking it with the CollectionDataContractAttribute. See the Microsoft .NET Framework documentation for other supported types.
`
Any suggestions.

Answer 1

It's not a good practice to send a DataTable over a service.
As stated by govindaraj here:
The best way is to use custom collection of custom object.
If you're using 2.0, then you can use generic collection instead of
custom collection to reduce code.
How?
Create a custom data object (containing only private fields and public properties for each field) that is similar to each row in the
datatable.
Create a layer that will do all database (in this case, dataset) access and translation to the custom object.
All client code will access that layer.