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I am running a C# executable which was built with a reference to a .Net library. The .NetLibrary is a wrapper around a C++ library, which resides in another folder (separate folder from the .NetLibrary).

The C++ library is in /usr/local bin The .Net library is in /projects/csharp/NetWrapperProj/bin/Debug The executable is in /projects/csharp/testharness/bin/Debug

As you may have guessed from the paths, I am running .Net using mono on Linux (Ubuntu 10.0.4). mono version 2.10.

How may I specify the required binaries to the executable - to avoid Unhandled Exception: System.IO.FileNotFoundException type exceptions being thrown?

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  • Why do you have a library in /usr/local/bin? This is not a place the loader will look for it. Put it somewhere inside $LD_LIBRARY_PATH. Commented Aug 2, 2011 at 12:04

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Normally, the DLLs/Libraries need to be in the same directory as the executable. From the Mono website:

If a library location has not been explicitly specified in a DllMap entry in an application or assembly .config file, Mono will search for a library in a few places:

  • The directory where the referencing image was loaded from.
  • In any place the system's dynamic loader is configured to look for shared libraries. For example on Linux this is specified in the $LD_LIBRARY_PATH environment variable and the /etc/ld.so.conf file. On windows the $PATH environment variable is used, instead.

You can read more at the Mono website on how to remedy this problem.

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