Access denied error when building solution in Visual Studio 2005

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I get the following error in Visual Studio 2005 when doing a build:

Error 9 Cannot register assembly "E:\CSharp\project\Some.Assembly.dll" - access denied. Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) project

It happens only intermittantly and does go away if I restart the IDE, however this is incredibly annoying and I would like to put a stop to it happening permanently, if I can. I've checked the assembly itself, and it is not set to read only, so I've no idea why Visul Studio is getting a lock on it. I am working in Debug mode.

I've had a look around google, but can't seem to find anything other than "restart VS". Does anyone have any suggestions as to how I can resolve this annoying problem?

c#
visual-studio-2005
asked on Stack Overflow Sep 17, 2008 by Stuart Grassie • edited Mar 22, 2009 by Mihai Limbășan

3 Answers

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It sounds like you have a DLL that gets locked every now and then, preventing VS from overwriting/locking it. Have you tried using tools like Process Explorer (http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx), or Unlocker (http://www.emptyloop.com/unlocker/) to see what is locking the DLL? Unlocker in particular has saved me many a time.

As noted in the comments below (Thanks Jeff), you can also kill an individual lock from within Process Explorer.

answered on Stack Overflow Sep 17, 2008 by Raithlin • edited May 23, 2017 by Community
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I've been getting something similar, thought I'd add this link for anyone ending up here from google: http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/ba9d67b3-9d14-4a2a-ac5a-91441032ded4

answered on Stack Overflow Jun 25, 2010 by timB33
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This may be caused by Visual Studio requiring administrator rights on Windows 7 or higher. To check, see whether the registry key mentioned below is set. If not, copy into a .reg and merge. Be sure to check that your Visual Studio 2005 installation path in the .reg file is correct!

Windows Registry Editor Version 5.00

; Run Visual Studio 2005 with administrator rights
; This is required to run / debug the program directly from the IDE
[HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers]
"C:\\Program Files (x86)\\Microsoft Visual Studio 8\\Common7\\IDE\\devenv.exe"="~ RUNASADMIN"
answered on Stack Overflow Nov 5, 2018 by AlainD

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