I would like to execute nGen at the end of my installation simply to improve the perceived performance of the first startup of my application. How could I do that? Is there are
As 'Micah' says, Yes, You'll find NGen installed with .Net Framework.
Take a look at WiX 3.5 installer examples how to NGen your assemblies during installation.
NGen: Creating Setup Projects
I hope this will help you.