How to register .Net 4.5.1 with IIS8 on windows 10

Question

How to register .Net 4.5.1 with IIS8 on windows 10 machine? it used to be simple as running command "aspnet_regiis -i"...but not anymore. if try to run this command i get error

This option is not supported on this version of the operating system. Administrators should instead install/uninstall ASP.NET 4.5 with IIS8 using the "Turn Windows Features On/Off" dialog, the Server Manager management tool, or the dism.exe command line tool. For more details please see http://go.microsoft.com/fwlink/?LinkID=216771. Finished installing ASP.NET (4.0.30319.0).

Also in windows 10 under "Turn windows feature on & off" windows why i dont see .net 4.5 or 4.5.1? i do see 4.6 though. Is it same as 4.5.1?
(note i am sure 4.5.1 is installed on my machine because visual studio allows me to set target framework 4.5.1 on web applications and i have several applications which runs on 4.5.1 without any issue)

Solution 1

You can use the dism tool to enable features built into Windows. To install .NET 4.5 (or 4.6, they're the same since it's the same CLR4 underneath) into IIS, I think this will work:

dism /online /enable-feature /featurename:IIS-ASPNET45 /all

The /all flag will include any dependencies so you don't have to figure them all out.

You can also see all of the available features by running:

dism /online /get-features

As an aside, aspnet_regiis was used when you needed to install a version of the CLR into IIS. Since all versions of .NET since 4.0 use the same CLR versions, this is now built into the Windows features. So you use DISM to enable the feature instead.

Solution 2

i do see 4.6 though. Is it same as 4.5.1?

.NET 4.6 is a drop in replacement over 4.5.1. Meaning, your 4.5.1 applications will run on 4.6. So you could say that 4.6 "includes" 4.5.1.