It looks like the version numbers of the iCal.NET DLLs for both .NET core and .NET Framework have not been updated since 4.1.8. This caused some confusion by InstallShield when it tried to run an upgrade, but left the old DLL on the target system (because the versions were still the same), which then caused runtime errors from .NET when our process ran.
It looks like the version numbers of the iCal.NET DLLs for both .NET core and .NET Framework have not been updated since 4.1.8. This caused some confusion by InstallShield when it tried to run an upgrade, but left the old DLL on the target system (because the versions were still the same), which then caused runtime errors from .NET when our process ran.