How to solve compilation target framework 4.5 error?

Question

I want to deploy my ASP.Net site on IIS on my own server. I already deployed one site, that is currently in Active , that active site working on version 2

IIS image

You can see DefaultAppPool that is my old website, that version is 2. My new website called Matejer Report

when I do deploy on IIS of my local machine, it's working fine. But when I try to deploy on my server it's showing the following error

Error message

So, Do you I need to install .Net Framework 4.5? ,

If, yes How to install on windows server 2008 R2?.

I already downloaded the file www.microsoft.com/en-in/download/confirmation.aspx?id=42642. Is it correct link?

After I install it, Will it affect the old webisite (DefaultAppPool) which is running on version 2.0?

Answer 1

Go to here msdn

and go to Download page for 4.5 web installer and select your language and click on Red download button.