Evaluating the function

Try this option from visual studio menu to avoid this error. but, this is not recommended from microsoft.

Debug > Options > "Use Managed Compatibility Mode"

Replaces the default debugging engine with a legacy version to enable these scenarios:

You are using a .NET Framework language other than C#, VB, or F# that provides its own Expression Evaluator (this includes C++/CLI).

You want to enable Edit and Continue for C++ projects while mixed mode debugging.

Note that choosing Managed Compatibility mode disables some features that are implemented only in the default debugging engine.