I guess it is something like sgen.exe which generates some serialization classes in separate assembly. Is that it? Should generated assembly be referenced? If so, by which project?
I have noticed that some LINQ queries are very slow, when executed for first time. Maybe bltgen tool can help?
I'll start a bltoolkit blog when I find all this answers :)
@Admin: Please add bltoolkit tag
BLTGen emits type accessors and abstract classes. In the following example you can find how to configure your project to use BLTGen - http://www.bltoolkit.net/Doc.PartialTrust.ashx.
Generated assemblies do not have to be signed.
BLTGen may speed up LINQ queries a little bit, however I think the problem is loading and initializing .NET framework components for first time use.