[Resolved] Could not load file or assembly 'XXXXX' or one of its dependencies. An attempt was made to load a program with an incorrect format.

I have recently switched my development environment from 32-bit to 64-bit by installing Windows Server 2008 64-bit and modify it to be used as workstation as described here http://www.win2008workstation.com/ and I'm really amazed with it’s performance.

I have faced the problem mentioned in the post title when I'm trying to run a web application included in one of our development solutions.

couldnot load

I have checked the project which has the DBHelper as it’s output and I’ve discovered that the project configured to target x86 platform and as I'm working with 64-bit it will have such ‘incorrect format’ error.

How to fix it:

Simply follow the steps below :

  • open project properties window.
  • select Build tab
  • Change it to ‘Any CPU’
  • Save your changes.
  • Compile your project and run :)



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