Could not load file or assembly … or one of its dependencies. An attempt was made to load a program with an incorrect format (.resx file)

Question

I am getting the following error message when compiling or attempting to run my application on Windows 7 64 bit. I\'ve scoured the Internet and many people have the same err

Answer 1

I have run into the same problem with one of my programs. The issue is that for some reason the Visual Studio appears to be generating 64 bit data blocks for some of the GUI control properties, which it is then unable to load when compiling to x86.

In my case, I am able to work around the problem by deleting the problamatic data blocks from the resx file along with the line code lines in the cs.designer file that reference those blocks. I am able to do this as the corresponding source code lines that are assigning the referenced property are redundant and not needed. The only annoying thing is that I have to redo those fixes each time I modify anything in the designer, as Visual Studio then adds back in the bad code.

Answer 2

This appears to be a VS 2010 bug with image lists. See https://connect.microsoft.com/VisualStudio/feedback/details/532584/error-when-compiling-resx-file-seems-related-to-beta2-bug-5252020?wa=wsignin1.0

I was able to utilize the workaround listed to get it to work for me.

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Posted by Luis Mack on 5/12/2010 at 8:50 AM I've found the same problem, only for a specific project when compiling on a 64-bit machine. A fix that SEEMS to work is to manually alter one character in the image stream EVERY TIME the usercontrol or form is edited in the designer

          AAEAAAD/////AQAAAAAAAAAMAgAAAFdTeXN0ZW0uV2luZG93cy5Gb3JtcywgVmVyc2lvbj00LjAuMC4w

Change to      AAEAAAD/////AQAAAAAAAAAMAgAAAFdTeXN0ZW0uV2luZG93cy5Gb3JtcywgVmVyc2lvbj0yLjAuMC4w

That is 00LjAuMC4w back to 0yLjAuMC4w at the end of the line (00 back to 0y)

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Jim

Answer 3

My simplest solution has been to just go into the error'ed line and change the base64 to base32

<data name="myGUIcontrol.myObj" mimetype="application/x-microsoft.net.object.binary.base32">
... block of binary here

But I would like to find a way to keep it from happening every time I make a change in designer. Maybe an attribute for the class that forces VS10 to make it a base32 ??

Answer 4

We have faced the same issue last week, and we found a good workaround.

You have to open the .resx file in the Designer and set the accessmodifier from public to no code generation.