Mark is correct. You can not just copy the folder. If you want to manually install the .Net Framework on every computer you should use windows update to do it. But really, that's not the nicest solution. Your best option is to create some kind of deployment package. If you want to deploy your app on the web you could look into use ClickOnce, which you can research
here[
^]. Otherwise you should look at a setup or deployement project. Try
Here[
^] for help with that. You could also use a third party product to create a setup.exe for your app...but if you're just starting out you'll probably find more help using a standard microsoft method.
Hope this helps.