unable to evaluate expression whilst debugging

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I faced it today with VS2013.

Goto Tools –> Options –> Debugging –> General –>
Scroll to the bottom for “Use Managed Compatibility Mode” and Select the option.

Screenshot from the blog(url below):
enter image description here
Restart you debugging.

What Helped Me is below!

  • Visual Studio 2013 Could not evaluate Expression Debugger Abnormality
    turned out to be very helpful.

  • Also, you could see @Dreamers answer Unable to debug managed code using visual studio 2013

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