Hola!

I have just created a new empty solution, then copied all the source files from an existing solution into it.

The existing solution (website) runs fine and has been for a year, but when I build the new one it gets lots of errors.

Mainly that system.data needs importing.

Why would this be? As the original is working fine. Also i fix all the errors in my project and rebuild and i just get more errors on different pages, why doesnt it list them all at once?

Thanks