Dehru Cromer

I did this migration in 2016-2017 on a pretty large app. Search "migrating from angularjs to angular" and you'll find tons of advice. And some tools. We chose to upgrade based on route, where basically more of our routes were handled by Angular over time and less by AngularJS. The whole migration took about 18 months, the app continued to work fine, and eventually, it was all migrated.

Here are some tools that can help suggest a path forward. https://blog.angular.io/migrating-to-angular-fc9618d6fb04

Coming from C# I think you’ll find Angular comfortable. If you were more node/ruby/web developer savvy I’d probably recommend React.

Angular comes with everything you need out of the box, it’s a bit more opinionated framework. React is a series of libraries that you can patch together to tweak exactly how you like to web dev.