Microsoft has announced that DataContractserializer in version net35 sp1 will no more require class attributes DataContract and DataMember (finally).
However, it is intersting that DataContractSerializer implementation in Silverlight already does not require [DataContract] and [DataMember] attributes on classes, which have to be serialized.

:)

Read the complete post at http://developers.de/blogs/damir_dobric/archive/2008/08/06/datacontractserializer-in-silverlight.aspx