We are developing WinForms apps, i.e. no plans for web apps and I'm wondering, in our environment, what are the pros/cons of putting all BOs into a library. The library sounds appealing but does it have any downsides?

If libraries get the nod are there any downsides to having multiple libraries for different uses, e.g. establishing a library of BOs that are just used for populating list controls.

Cheers, Peter