Selenium provides a useful Chrome plug-in (that works in the new Edge) that you can use to collect and play back interactions, building and testing simple scripts. Using WebDriver with C# ...

Take advantage of the lightweight, open source BenchmarkDotNet library to benchmark your methods and track their performance.

The official language for Android development is Java but it isn't the only language you can use to develop Android apps.

Creating and using an SQLite database for data persistence in Android apps. Covers the basics, as well as using foreign keys. Full source included.

C# and F# are languages, each with growing user bases, that approach functional programming in fundamentally different ways. Some developers are using F# as a complement to C#.