Steps to reproduce:
1. Download and open the attached project (case_843277-MFTest\MFTest\Unity\MFTest)
2. Press play

Result: crash

Reproduced on 5.2.3f1. 5.3.6f1, 5.4.2f1, 5.5.0b9, 5.6.0a1

Note: There are 3 projects attached within - a C++ version, a C# version and a Unity version
Note: User is trying to integrate MF .Net into Unity. This C# set-up works in VS/Monodevelop (even if in it's current state it does not do much besides call), but results in a crash when ported into Unity
Note: Crashes when getting to the first call in Main.cs, line 22

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COM Interop is not a supported technology within Unity and MF .Net seems to make extensive use of it.
The recommended way to access these Win32 APIs would be to expose simple C APIs to managed code via PInvoke and handle the COM logic in a native library