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Editorial Team
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Asked: 2026-06-13T05:10:40+00:00

I downloaded an open source project written in C# and I can build that

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I downloaded an open source project written in C# and I can build that project. However, I got the error like this during run time:

Could not load file or assembly ‘Interop.ComUtilitiesLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null’ or one of its dependencies. The system cannot find the file specified.

This means it couldn’t load the Interop.ComUtilitiesLib.dll file, I have checked in project root directory as well as in the Window/System32, still couldn’t find the Interop.ComUtilitiesLib.dll file.

Any suggestion for me to fix this problem!

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1 Answer

  1. Editorial Team

    Does the project include a ComUtilities.dll file? If so, it might be a COM object that needs to be registered via the command line:

    regsvr32 ComUtilities.dll
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