Useful features from C# 7 to & 9 with Julien Couvreur

We have invited Julien Couvreur to show us useful features from recent versions of C#.
In this meetup, Julien will talk about some of the hidden gems in C# 7 to 9.
He will cover general-purpose features like pattern matching, local functions, async improvements, nullable reference types, default interface members, and tuples.
Bio:
Julien is a longtime C# and .NET explorer turned compiler dev and language designer at Microsoft.