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Comment by Serow225 | Hacker News Reader

If you want to see how much code you get 'for free' by defining a record that you used to have to do manually, check out the generated C# here (structural equality, GetHashCode, Deconstruct, cloning for 'with', pretty printing, etc)

https://sharplab.io/#v2:EYLgtghgzgLgpgJwDQBMQGoA+BYAUANwgQAI...

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Aren't records meant to be immutable?

I don't understand why properties have setters in the generated definition of the record. I'm missing something.

Constructor-defined properties of records are implemented using auto-implemented properties with the new init keyword, so:

    public int MyProp { get; init; }

instead of

    public int MyProp { get; set; }

Apparently those are implemented using readonly backing fields while still retaining property setters.

That’s neat!

It’s also generating code for the main method, which is also a new c# 9 feature

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