distributing a c#/winform app, how can i add dotnetfx.exe to my app?

[confused1234]

Hi,
I am about to deply my first winforms project.

I recently learnt that the users needs .net installed on their machine.

I stupidly thought that this would be package automatically with 2000 xp vista etc, silly me.(why not?? and keep upto date with windows update?)
anyway...

firstly, i plan on distributing this app via web and usb stick.

Now i want to either:

1. combine the .net framework with my exe and install it seemlessly without the user knowing.

2. check if they have it the first time my program runs and then download and install it seemlessly if they dont have it?
is this possible?
someone talked about clickone? is this what i need? what does it do?
are there any alternatives?

[Plater]

If you create an installed project for your program you can set it as a requirement.

Isn't dotnetfx just the beta name of .NET3.0?

[confused1234]

what do you mean requirement?

[Plater]

You add it as a requirement in the installer project then when someone runs the installer it handles all the tasks of installing .NET if needed.