how to include .NET framework with application for distribution to client

Hi!!!!!!
I have made an application and made its exe file also............
But I don't know how to inbuilt .NET framework with my application to distribute my application to clients.......

When the user is online then .NET framework automatically installs but in offline mode its giving error for .NET framework...........

Can anyone tell me how can I inbuilt .NET framework with my application to distribute it to clients............