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Editorial Team
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Asked: 2026-05-13T15:46:09+00:00

We are moving to an all-64-bit development environment. Unfortunately VS 2008 and, more importantly,

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We are moving to an all-64-bit development environment. Unfortunately VS 2008 and, more importantly, its built-in web server, run in 32-bit mode. When debugging code that references 64-bit assemblies – Oracle.DataAccess, for example – we experience the dreaded System.BadImageFormatException.

Can anyone offer any strategies for debugging code with 64-bit dependencies in VS? I suppose we could use a 32-bit Oracle provider, but we would like to emulate the production environment as closely as possible.

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  1. Editorial Team

    I have a similar setup on 64 bit Vista where I have the web site deployed in IIS – this site has in been successfully run and debugged in both 32 and 64 bit.

    The biggest problem I have found is working in a mixed environment where some members on the project team are still on 32 bit Windows (both XP and Vista).

    This causes headaches with project references to Oracle.DataAccess which I have only managed to solve with bindingRedirect entries in the web.config file in order to point to the correct version of the assembly.

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