Your app has entered a break state, but there is no code to show because all threads were executing external code (typically system or framework code)

Question

Visual Studio 2017 breaks in debug mode and displays the message:

Your app has entered a break state, but there is no code to show because all threa

Answer 1

I had a similar issue when debugging a VSTO Excel add-in. After trying everything, I resolved the issue by disabling a realtime protection module on my antivirus software.