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Editorial Team
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Asked: 2026-05-24T02:03:42+00:00

I use third party library in my project. Call it like MainLibNET.dll . I

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I use third party library in my project. Call it like MainLibNET.dll. I added this library in References of my project. This dll has dependencies with other dlls. This other dlls I can’t add in References because they are native. I put this other libraries in \bin but when I start my project I get error:

Could not load file or assembly 'MainLibNET.dll' or one of its dependencies

MainLibNET.dll can’t find its dependencies because when site starts the server returns MainLibNET.dll not from \bin but from here:

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e9b9d054\ddfaf4f8\assembly\dl3\8e683e03\00c3703b_919bcb01\MainLibNET.dll

and there are no other files in this folder except MainLibNET.dll. If I copy other dlls in this folder it works fine.

What can I do with my project or with anything else to make my project work without hand-copying?

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1 Answer

  1. Editorial Team

    Managed assemblies get shadow copied by ASP.NET. This process doesn’t include unmanaged libraries which explains why they cannot be resolved. One possibility is to add those native libraries into the c:\windows\System32\Inetsrv folder. Another possibility is to put them into a folder which is part of the PATH environment variable.

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