DataContractSerializer requires classes and members to be marked with the
DataMember attributes. However, in my case the classes are auto-generated with the EFPocoAdapater framework and these attributes are not present.
How can I force serialization of all members using the DataContractSerializer without these attributes being present?
This changed in 3.5SP1, hope you saw that: http://www.pluralsight.com/community/blogs/aaron/archive/2008/05/13/50934.aspx
You cannot - plain and simple. The attribute are needed for the DataContractSerializer to pick up which elements to serialize. In contract to the XmlSerializer, which basically just serializes everything (unless you explicitly tell it to ignore it), the DataContractSerializer is "opt-in" - you have to explicitly tell it (by means of the attributes) which fields and/or properties to serialize.
UPDATE: As several folks have pointed out, with .NET 3.5 SP1, Microsoft loosened those rules up a bit - any public read/write property will be serialized automatically by the DataContractSerializer. At the same time, your class also needs to have a parameterless default constructor - sounds like the exact requirements we had for XmlSerializer way back when....
Of course, this:
I still think these thing ought to be explicit and clear, making those no longer required opens up the path for lazy/sloppy programming - I don't like it. But if you want to, you can use it now without explicitly marking your properties with [DataMember].....
Just mark the class with the [Serializable] attribute. Any members you don't want serialized mark with [NonSerialized]. Note that [Serializable] causes all fields to be serialized by default, where [DataContract] serialized no fields by default except those marked with [DataMember].