.NET 6 and C++/CLI Dllexport p/invoke in problem

JieGG 1

I discovered a serious problem.
I in c++ used cli and dllexport, try in use C# 'P/Invoke' call c++ dll export function. but in DoNet6 throw 'SEHExcption'; but DoNet5 can normal working.

issues demo:
C++ code:

C# code:

Viorel 112K Reputation points

2022-01-16T17:20:11.273+00:00

Did you determine the module and line that raises the exception (maybe checking the Call Stack)?

To work around the problem, perhaps you should create a Class Library instead of DLL, or use managed functions or classes, avoiding [DLLImport].
JieGG 1 Reputation point

2022-01-17T03:58:26.76+00:00

My use scenario requires a DLL to relay messages, above code in DotNet5 working normal.
Jack J Jun 24,286 Reputation points Microsoft Vendor

2022-01-18T07:09:59.09+00:00

@JieGG , could you provide the related code about your class1?
JieGG 1 Reputation point

2022-01-18T07:14:54.467+00:00

Yes, Class1 code: