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Home/ Questions/Q 7705689
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Editorial Team
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Editorial Team
Asked: May 31, 20262026-05-31T23:55:33+00:00 2026-05-31T23:55:33+00:00

I have a few Assemblies: MyInterfaces.dll, MyImplementations.dll, MyTestApp.exe In my config I do the

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I have a few Assemblies: MyInterfaces.dll, MyImplementations.dll, MyTestApp.exe

In my config I do the mapping but I get the following error during runtime:

The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047)

My question is:

Do I need to register my two assembly in the GAC or do just the /bin folder of MyTestApp? Otherwise what am I doing wrong?

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  1. Editorial Team
    Editorial Team
    2026-05-31T23:55:34+00:00Added an answer on May 31, 2026 at 11:55 pm

    The assemblies should just have to be accessible to your app through any of the “normal” means (in the GAC, in the same directory, etc).

    Are you using fully-qualified assembly names in your config? Like:

    MyInterfaces, Version=1.2.3.4, Culture=neutral, PublicKeyToken=b77a5c561934e089

    You could try using the Fusion Logger to see what is happening too.

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