Step - 1 : How To Add Application Pool ASP.NET 4.0 To IIS

> 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

Step - 2 : 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.

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