How to resolve the "Encountered multiple versions of the assembly with GUID '' while converting project from VS 2008 to VS 2010

Question

I just converted my project from VS 2008 to VS 2010, here is the error I am getting now :-

Encountered multiple versions of the assembly with GUID ''. Try pre-importing one of these assemblies.

I already tried to clean solutions, projects, and recompile, close and open again. but no luck.

score 5 · Answer 1 · edited May 23 '17 at 11:54

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Are any of your references to the debug folder? If so you'll want to remove them.

EDIT - Since you mentioned COM Object in your comment....

Assembly error building app - Encountered multiple versions of assembly

Looks like it's a bug in VS 2010....

edited May 23 '17 at 11:54

Community

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answered Nov 25 '11 at 16:05

Kevin LaBranche

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OH: Well this might be your issue... http://stackoverflow.com/questions/5901052/assembly-error-when-building-application – Kevin LaBranche Nov 25 '11 at 16:30
Klabranche How to get rid of it? – User13839404 Nov 25 '11 at 16:40
I haven't had this issue but the reference to it doesn't seem too promising that it can be fixed without MS fixing it... – Kevin LaBranche Nov 26 '11 at 15:06
Man I love you! :) Removed all references pointed to debug folder. Tried to compile. Added references again and build succeeded! – Sergejs Jun 20 '12 at 10:20
@Sergejs If only I could make everyone fall in love with me so easily. :-) – Kevin LaBranche Jun 20 '12 at 18:09

score 2 · Answer 2 · answered Aug 18 '16 at 04:41

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You should try to change .net Framework3.5 to .net Framework4.5.

answered Aug 18 '16 at 04:41

GongchuangSu

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score 0 · Answer 3 · answered Nov 14 '13 at 09:32

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Had same problem. Noted some references which looked invalid under References folder in the Solution Explorer. Right Click and Selecte Remove.

Once removed the thing worked just fine.

answered Nov 14 '13 at 09:32

Isaac Wafula

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score 0 · Answer 4 · answered Nov 25 '11 at 16:04

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If you open your "Assembly.cs" file, there is a GUID in there for your application... for grins, I would just try changing the GUID via generating a new new (don't have VS open for menu action to generate GUIDs, but its there). Then try to recompile. your project(s) and final application.

answered Nov 25 '11 at 16:04

DRapp

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How would i generate GUID? do you mean through c# code.. and copy it and paste in this project?? – User13839404 Nov 25 '11 at 16:08

How to resolve the "Encountered multiple versions of the assembly with GUID '' while converting project from VS 2008 to VS 2010

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