.NET Framework 4.0 Gacutil.exe (Global Assembly Cache Tool)

Latest gacutil is part of Microsoft Windows SDK for Windows 7 and .NET Framework 4. Remember you can’t use previews version of gacutil (1.1 or 2.0/3.5) to register dll built in framework 4.0.
If you don’t want to install whole SDK you need to copy below files to server, only. Of course you need to install SDK on local machine to be able copy below files to server.
1. Files location: C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin\NETFX 4.0 Tools
List of files required to gacutil work properly:

  • gacutil.exe
  • gacutil.exe.config
  • 1033\gacutlrc.dll (can be placed in the same dir as gacutil.exe on the server)

Another interesting thing about assembly in 4.0 framework is location of your assembly. Location changed from C:\Windows\assembly\ to C:\Windows\Microsoft.NET\assembly\GAC_MSIL

Remember to unregister assembly you need to use commend:
gacutil /u assemblyname (you can’t use assemplyname.dll)

Additional information:
Understanding The CLR Binder
gacutil MSDN

2 thoughts on “.NET Framework 4.0 Gacutil.exe (Global Assembly Cache Tool)”

  1. Seems strange that they don’t make it backwards compatible. I wonder why? after all you can open Word 2007 documents in 2010, why not be able to register older .dll components with a newer gacutil?

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