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BadImageFormat Exceptions on 4.5.13 and 4.5.15 of dotNetAgent.

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BadImageFormat Exceptions on 4.5.13 and 4.5.15 of dotNetAgent.

We are experiencing loss of functionality - replaced with a "BadImageformat" exception and the IIS Server returning HTTP 400 to the clients in one of our services every X number of App Pool Recycles in production and have managed to track this back to the AppDynamics agent. We initially ran 4.5.13 and were able to reproduce the error behaviour in our QA environment, and also to see it disappear as an issue when AppDynamics was uninstalled and IIS restarted. Our hope was that 4.5.15 would've fixed this issue, despite it not being mentioned on the fix list. Unfortunately we seem to be able to reproduce the error behaviour here too, albeit less frequently. I thought this issue was fixed in a much earlier version of the DotNetAgent?
BadImageFormat Exceptions on 4.5.13 and 4.5.15 of dotNetAgent.