install .Net Framework during deployment?

is there a way to install .NET Framework on the targeted computer during the deployment process?

is it a must to install .NET Framework first before the deployment of the application that ive wrote?

can it be done in a setup program?

thx in advance!

-Jeffrey-

as long as the setup program is just MSI and not .NET it could be done. I discussed this today, with a friend.

Found this on MSDN which pretty much backs up what's already been said.

Bootstrapper Sample