Application Pool ASP.NET 4.0 Is Not Present In IIS - How To Add

First of all, if Framework 4.0 Is Not Available, please install framework 4.0 from here. Click Here For Installing .NET Framework 4.0 . After installing framework 4.0, if it is not available on IIS, follow these steps. You need to register framework 4.0 to IIS

Open Command Prompt as Admininstrator. And type
C:\Windows\Microsoft.NET\Framework\v4.0.30319\ and press Enter key. Now type aspnet_regiis.exe -ir and press Enter key. By this way, you can Register Framework 4.0 To IIS. Now close IIS and re-open IIS, you can see Framework 4.0 on your application pool list. That's all, by this way we can resolve this issue.