Visual Studio 2008: Creating Single DLL from Solution with Many Projects

Question

I have an ASP.NET web application developed in Visual Studio 2008, composed of 3 different projects (one for UI, one of BO and the third for DAL).

How can I generat

Answer 1

I do not know if there's indeed this feature in VS2008. But you certainly can do it outside VS.

E.g.:
Merging .NET assemblies using ILMerge