Additional resources for GitHub Copilot and performance profilers

The words ReadOnly, Immutable, Frozen seem similar but have distinct meanings in .NET. Here's a detailed comparison of Readonly, Immutable, and Frozen collections in C#, with benchmarks and typical use cases.

So you are interested in learning more after my session '.NET 5 to 9 for developers in a rush'? That's great!

With HashSet, you can get a list of different items in a performant way. What if you need a custom way to define when two objects are equal?

You have a collection of items. You want to retrieve N elements randomly. Which alternatives do we have?