The type of the argument object [type] is not primitive.

Question

I'm trying to create a simple Guestbook web service using ASP.NET WebServices.

When trying to serialize a list of objects, I get the following exception:

System.InvalidOperationException: The type of the argument object 'GuestBookService.GuestBookEntry' is not primitive.

How can I fix this error?

Answer 1

is GuestBookEntry marked as serializable? http://ondotnet.com/pub/a/dotnet/2002/08/26/serialization.html