I’m having the same exception:
System.ArgumentException: An item with the same key has already been added. at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at …….
Visual studio 2017 v.15.8 + VisualGDB 5.4 preview 4
Create new MinGW Windows project, then switch configuration from the dropdown: debug->release->debug->release
Visual studio 2017 v15.7 doesn’t have this problem.
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This reply was modified 6 years, 1 month ago by Fedexx2.