Jun 20, 2018 01:43 AM|bruce (sqlwork.com)|LINK
index.html is loaded by the static file handler (probably IIS). you won't get a global.asax breakpoint until you make an ajax call from the angular application.
I don't know you angular project setup, but often the index.html in the src folder is just input to the build. there should be a index.html in root/deploy folder that you should set as the startup file.