C# sample attempted to read or write protected memory.

[megamarc]

Seems to be related to the C# "delegates" (the equivalent of C function pointers).

The correct startup and render the full frame denotes correct matching of .net/native dll. If not, it wouldn' start at all.
The fact that it crashes when the delegate callback is called denotes a delegate managing problem, something that can be tricky.

The error happens only running from the debugger in SharpDevelop? Can you run the executable directly from the command line or double-clicking it? We have to discard the environment itself doing funny things. My test environment is Visual Studio (it's free) and it runs there.