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Asked: 2026-05-14T03:13:27+00:00

By default, my application references a mixed mode DLL, so this DLL is both

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By default, my application references a mixed mode DLL, so this DLL is both 32 and 64 bit. On a 32 bit system, my app is MSIL and loads the 32 bit DLL. On a 64 bit system, my app loads the 64 bit.

However on a 64 bit system, in an older version of the assembly that I am referencing, they only created a 32 bit version. So I fail to load this. I was looking at doing it dynamically, and ideally I would want my MSIL app in 64 bit mode to load the 32 bit DLL. Is this possible?

Also it would be nice to resolve it to a different version than what I have referenced as well.

Any help appreciated.

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1 Answer

  1. Editorial Team

    You cannot load 32-bit DLLs into 64-bit processes. “Any CPU” assemblies work because the JIT handles the IL compilation before execution, creating a native image of the appropriate type; CPU-specific assemblies don’t support JITing to different types.

    This is a Windows limitation, not a CLR limitation.

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