Visual Studio reference x64 GAC

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+4 Q:

Visual Studio reference x64 GAC

How can one get Visual Studio 2005/2008 to reference assemblies in the 64-bit GAC instead of the 32-bit GAC? We are settin the target platfom to x64 and the compiler is throwing the error of

Error 2 Warning as Error: Assembly generation -- Referenced assembly 'System.Data.dll' targets a different processor Common

Error 3 Warning as Error: Assembly generation -- Referenced assembly 'mscorlib.dll' targets a different processor Common

Error 4 Assembly signing failed; output may not be signed -- The system cannot find the file specified. Common

Update 29 Dec 08

Been trying out Aaron Stebner's suggestions to place 64-bit assemblies onto an isolated location (e.g. C:\Windows\Microsoft.NET\Framework64\v2.0.50727\GAC_64) and creating additional entries in the registry like HKLM\SOFTWARE\Microsoft.NETFramework\AssemblyFolders\GAC_64 or HKLM\SOFTWARE\Microsoft.NETFramework\v2.0.50727\AssemblyFoldersEx\GAC_64 but Visual Studio 2005 is still not picking it up....

Have you set x64 platform for all projects in your solution in Configuration Manager ?

Shrike 2008-10-22 08:46:10

Yes but it does not matter. It is the BCL assemblies that the projects are referencing like System.Data.dll and mscorlib.dll. They are referncing the assemblies in the 32-bit GAC. Would be nice to have the option to reference the 64-bit GAC instead.

icelava 2008-10-22 08:55:17

+1 A:

I'm not sure why you would need to do this. .NET code that isn't specifically compiled for 32 bit will run 64 bit if it can. This includes the base framework libraries. In short, there is no reason that I know of to compile your assemblies specifically for 64 bit (other than referencing unmanaged 64 bit dlls, but you're talking about the GAC).

Some more information might help here.

sliderhouserules 2009-01-01 00:12:57

Yes we are compiling our application to specifically target x64. And because of that the compiler complains System.Data or mscorlib are targetting x86.....

icelava 2009-01-01 03:58:03

Have you redone the afflicted references after changing the compile target in project properties?

sliderhouserules 2009-01-02 01:32:17

I am trying to reference unmanaged 64 bit dlls for developers on 64 bit machines and unmanged 32 bit assemblies for everyone else. Is there a way to make that work automagically so the 64 bit rigs don't have to manually update their references every time they get latest?

Thank you!

PeteK 2009-03-05 22:24:45

In the Stackoverflow site, Answers should be focused on the original question topic. They do not fit in like regular threads in traditional forums. You ought to open your own question to attract answers dedicated to your scenario.

icelava 2009-03-06 03:16:04

Hi,

I've created a tool which is completely free, that will help you to achieve your goal. Muse VSReferences will allow you to add a Global Assembly Cache reference to the project from Add GAC Reference menu item.

Hope this helps Muse VSExtensions

Muse VSExtensions 2010-04-29 07:05:41

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Visual Studio reference x64 GAC

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