Sparating DLL in a same Project.??

[aspdotnet]

i'm working with multiful project ...

like this...

Homepia (main project)
-Board (Sub project)
-Vote (Sub project)
.
.
.

there are lots of project in main project

becauese i want to separate DLL by each Sub project..

but it's very inconvenience...

increasing compile time..., folder management difficult...

so....Is there any way to seperate Dll in same project

without separating project...

like below...

Homepia (main project)
-Board (it's just Folder...Not Sub project) ==>Board.DLL
-Vote (it's just Folder..Not Sub project) ===> Vote.DLL
.
.
.

Creating DLLs in a Project......is it possible??