C# Web Service - Error Handling

[sist_si]

Hi there!
I'm new to web services and I'm building my 1st one (the asmx way). It's all working nicely but I want to be able to present my error messages (such as login error etc) a bit more nicely.
My "GetResults" method pulls back data from the database upon logging in successfully and I'm compiling a List<> of my Items and returning them.
However, if there is an error, I want to instead return an instance of my "error" object to the user. At the moment, I can't change the return type of the method so the two objects are clashing. Any help?

 

[sist_si]

thanks guys!
i will go down the wcf route. for the moment tho, im sticking with asmx.

i'll try out the suggested method! nice one!

 

[sist_si]

just a quick follow up. the encapsulating object works a treat - cheers guys!