IIS installed the. NET Framework 4.0/4.5 but could not find the appropriate application pool

Usually because there is no registration caused, some of the installation package will help you register some not, feel a little pit.

Registration method: Click on the Start menu in the computer –> run the copy below to run it.

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe-i

The above is how the. NET Framework 4.0 is registered, in fact whether 2.0 or 4.0 or 4.5

As long as the corresponding directory registration can be, such as 2.0 of the registration method:

C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_regiis.exe-i

But is there a problem when installing version 4.5? No 4.5 files found, where is the problem?

A description can be found on MSDN on Microsoft:

[Original].net 4.5 is a in-place replacement for. NET 4.0,

When. NET 4.5 was installed it effectively replaces. NET 4.0 on the machine. . NET 4.0 gets overwritten by a new version of. NET 4.5 which-according to Microsoft-is supposed to be 100% backwards C Ompatible.

That is to say: NET4.5 is actually NET4.0 upgrade version, when you install 4.5, he will put your 4.0 cover off, and you NET4.0 folder at this time the inside is NET4.5.

Take a look at the version number in the 4.5 DLL library below.

The. NET Framework 4.5 is a in-place update on the 4.0 basis, and the Framework version C:\Windows\Microsoft.NET\Framework64 with the IIS application pool is still 4.0.

IIS installed the. NET Framework 4.0/4.5 but could not find the appropriate application pool