How to target multiple ASP.NET versions with AppCmd? When administering an IIS web server you frequently have to use AppCmd.exe to make configuration changes. Whether it is for a specific web site or server wide. Some might think AppCmd has its limitations; for example if they don’t know the options to use they might think you can only address the x64 .NET Framework version or only x86, or you can only target the current active .NET Framework version. Fortunately this is not true, you can address both x86 and x64 versions of .NET with AppCmd. Read how…

Most of us already know there are two versions of AppCmd available, one is located in c:\windows\syswow64\inetsrv\appcmd.exe and the other in c:\windows\system32\inetsrv\appcmd.exe These address either 64-bit and 32-bit.

But what for different Framework versions? There is a parameter available!

AppCmd .NET Framework version parameter

AppCmd.exe recognizes the parameter /clr. CLR stands for Common Language Runtime. By adding /clr to your command, you can address different Framework versions. For example, /clr:4 addresses the ASP.NET 4.0 and 4.5 configuration runtime, and /clr:2 addresses ASP.NET 2.0 (3.5).

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