Eight reasons to Try F#

If you watched Matthew Watt's talk at .NET Conf 2025, or if you have noticed the subtle introduction of functional types to C# (lambdas, records, discriminated unions, etc), you might be interested in learning more about Microsoft's original functional programming language, F#. On the other hand, you may be hesitant to introduce a new language into your codebase until you better understand how it feels to use that language in anger. To this end, I will lead a live coding demonstration in F# where I build a simple web service, break it under load testing, fix a subtle concurrency bug, and deploy a full stack web application. Throughout, I will highlight eight key language features that make F# a great option for writing, testing, and deploying type safe code.