Application crash C# icon size

Changing the size of the icons taskbar or docking - undocking the laptop on a newly installed windows 10 (activated and with updateds to day) with visual studio 2017 the c# application crash with a debug message. I have started the application development on win 7 but due to the OS change this is new. The code is a large code but I to see if some hints are available. On windows 7 no problem have been reported.

I do not change often the size of icons but undocking stations are relative usuall.

Exception thrown at 0x00007FFD302F9D8D (user32.dll) in Global_eDM.exe: 0xC0000005: Access violation reading location 0x000000001D3DE7B0.

Unhandled exception at 0x00007FFD302F9D8D (user32.dll) in Global_eDM.exe: 0xC000041D: An unhandled exception was encountered during a user callback.

The program '[14712] Global_eDM.exe' has exited with code 0 (0x0).