Much more information is needed.
Are you using the latest TA? Latest C# or VB.NET integration files? What function are you calling? What parameters are you using?
Etc.
.NET 7 Support
This doesn't seem to work in .NET 7. TurboActivate throws a weird exception:
The specified value must be greater than 0. (Parameter 'value')
Actual value was -1.
It works fine in .NET Framework. Any ideas?