I can install via gacutil, but not uninstall the same dll

Question

I have installed a DLL using the gacutil.

gacutil.exe /i SI.ArchiveService.CommonLogic.Exceptions.dll

Using the gacutil /l shows that it is indeed installed.

SI.ArchiveService.CommonLogic.Exceptions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=925c8734ae397609, processorArchitecture=MSIL

Then I wanted to uninstall it.

gacutil.exe /u SI.ArchiveService.CommonLogic.Exceptions.dll
Microsoft (R) .NET Global Assembly Cache Utility.  Version 3.5.30729.1
Copyright (c) Microsoft Corporation.  All rights reserved.

No assemblies found matching: SI.ArchiveService.CommonLogic.Exceptions.dll
Number of assemblies uninstalled = 0
Number of failures = 0

Why doesn't this work? How do I uninstall it?

score 29 · Accepted Answer · edited Oct 07 '15 at 21:53

29

Installing an assembly requires the path name of the DLL. Uninstalling requires the display name of the assembly. They don't have to resemble each other. Review the Assembly.FullName property. gacutil.exe /l (ell as in list) gets you a list of display names.

edited Oct 07 '15 at 21:53

SharpC

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answered Mar 25 '11 at 13:37

Hans Passant

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score 9 · Answer 2 · answered Mar 25 '11 at 10:54

Nevermind.

gacutil.exe /u SI.ArchiveService.CommonLogic.Exceptions

Did the job. Also navigating to C:\WINDOWS\assembly, right-click on it and then choose uninstall would do it. I figured it out by looking at its properties and the name was without the dll extension.

score 4 · Answer 3 · answered Jan 31 '13 at 21:16

4

This is a little safer if you have multiple assemblies with the same display name in the GAC

gactutil.exe /u myDll,Version=1.1.0.0,Culture=en,PublicKeyToken=874e23ab874e23ab

answered Jan 31 '13 at 21:16

dynamiclynk

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score 2 · Answer 4 · answered Mar 02 '17 at 14:55

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Came here while finding answer but did not get fully .

what you actually need to do is to use double quotes "Assemblyname" surrounding complete assembly name i.e

"YOURDLLNAME, Version=6.3.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"

Complete process , navigate to this path using command prompt : C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools

and run query : gactuil.exe /u "YOURDLLNAME, Version=6.3.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"

Hope this helps someone

answered Mar 02 '17 at 14:55

Usman Younas

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Note, don't specify .dll on the dll name. – NealWalters Mar 23 '18 at 14:02
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This method also works when you want to uninstall a specific version of the DLL and leave the other DLL's with the same name as is. – Morten Jan 19 '23 at 12:48

I can install via gacutil, but not uninstall the same dll

4 Answers4

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