Unable to load DLL 'foo.dll', but only when running through vhost

Question

This is a variation on the old

System.DllNotFoundException: Unable to load DLL 'foo.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E).

problem (where, of course, foo.dll is the name of an actual DLL). The strange part is that I only get this error when I "Run" in VS (2008 if that's relevant). That sits in the MyApp.vhost.exe processes.

If I run the actual app in a command line (MyApp.exe) I encounter no errors. The problem extends to unit tests with MSTest.

A check on the DLL with DependencyWalker on Foo.dll doesn't show any issues.

Any ideas?

Answer 1

Make sure the DLL is in the folder where your EXE is.