“Internal error in the expression evaluator”

Question

I\'ve encountered a problem in expression evaluator of visual studio 2015 that says \"Internal error in the expression evaluator\", after some investigations I found that th

Answer 1

Just extending on the solution provided by Patrick Nelson. For Visual Studio 2015+ as inquired, the steps are as follows.

If you're debugging at the moment, this option will be unavailable. Stop the debugger.

Go to Tools -> Options

and here under the Options select Debug -> General and scroll down to find the ...legacy C# expression.. option:

More information is provided here:

Switching to Managed Compatibility Mode

Note: There are also some serious drawbacks that occur from switching to the legacy mode. Especially Runtime Reflection of the implemented Interfaces becomes almost an impossibility or extremely inconvenient. There are also other Reflection methods which will throw errors.