I want to debug the Demo Access Control Plugin with breakpoint.But I launch the plugin into VS 2017 , the breakpoint appears with a warning and display :The breakpoint will not be reached yet. No symbol was loadedThanks for help

MIP
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This is usually caused by the plugin dll not being the newest build, usually you can do a post-build event command in Visual Studio that copies the dll to the right place and in that way ensure the dll is always the latest build.

https://supportcommunity.milestonesys.com/s/article/debugging-techniques-for-Event-Server-plugins?language=en_US