How can we migrate existing web applications from .net 2.0 to 4.0 in installshield project

How can we migrate existing web applications from .net 2.0 to 4.0 in
installshield project

References

Reference NO 1

http://stackoverflow.com/questions/15205982/how-can-we-migrate-existing-web-applications-from-net-2-0-to-4-0-in-installshie

Reference NO 2

http://stackoverflow.com/questions/13950922/wix-or-installshield-for-asp-net-application-installer

Reference NO 3

http://community.flexerasoftware.com/showthread.php?206727-New-net-4-0-App-Pool-will-Upgrade-all-2-0-App-pools-to-4-0-as-well

Reference NO 4

http://blog.webactivedirectory.com/2012/03/20/installshield-error-2147219705-with-net-4-0-and-dotnetcocreateobject-in-installscript/

Reference NO 5

http://www.ebintl.com/Careers/jobopportunities

Reference NO 6

http://www.componentsource.com/products/installshield-professional/summary.html

Reference NO 7

http://www.codeproject.com/Articles/562386/Lessons-learned-migrating-to-Visual-Studio-2012-an

Reference NO 8

http://www.sujitbhujbal.com/2012/10/net-framework-features-fromnet-20-to-45.html