Acrobat with .Net 3.5

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I have a visual basic program that I started working on under the .net 4.0 framework. I added the Adobe PDF Reader COM Component to a user control I had created and all was working fine. Not expecting it to be a problem when I dropped the .Net framework down to 3.5 for compatibility with AutoCAD I found a snag in my plan. Now I get an error about AcroPDFLib.dll being built by a newer runtime. Is there a way around this?

Here is the error:

Could not load referenced assembly "obj\x86\Debug\AxInterop.AcroPDFLib.dll".  Caught a BadImageFormatException saying "Could not load file or assembly 'C:\Visual Studio 2010\Projects\SupportIT\SupportIT\obj\x86\Debug\AxInterop.AcroPDFLib.dll' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded."

Thanks,
Jason

Posted 6-Jun-11 11:33am

JasonSelf

Updated 6-Jun-11 11:34am

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Simon_Whale 6-Jun-11 17:41pm

have you tried to recreate the pdf viewer on a new form? as i suspect it is because you have created a form in framework 4 and rolled it back to 3.5 (sadly they are'nt forward compatible)

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Dave Kreskowiak · Accepted Answer · 2011-06-06T15:49:00

Solution 1

Did you try removing the reference to the COM component, deleting the resulting .DLL's and re-adding the reference while youre project was set as a .NET 3.5 app?

Posted 6-Jun-11 15:49pm

Dave Kreskowiak

Comments

JasonSelf 7-Jun-11 11:17am

Thanks for you replies, but It doesn't look like this is working. I deleted the toolbox item, the user control, and the references under 'My Project' then I manually deleted all the Acrobat referencing dll's etc in the project folder...I then built the control again from the beginning and get the same error. I dunno?

JasonSelf 7-Jun-11 12:14pm

I started a project and the first thing I did was drop it down to 3.5, Then I added the control and everything is working fine...I guess I have a reference that I am not finding that I need to get rid of?

JasonSelf 7-Jun-11 12:36pm

Ok, I got them all, it works now...thanks