What is invalid managed/unmanaged type combination mean?

Question

C# QUESTION

Vulpes · Answer

This sounds to me like the error you sometimes get if you're using the MarshalAs attribute when calling unmanaged functions from C#. This attribute takes an UnmanagedType enum member as a parameter and since the rules for marshalling between managed and unmanaged types are complex you can easily come up with a mismatch.

Sam Hobbs · Answer

Please provide more information.

What is "invalid managed/unmanaged type combination" mean?