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I'm not sure if it's what you mean, but can't you have all your properties without a setter, and only init them inside the constructor for example ?

Would your 'readonly' annotation dictate that at compile time ?

eg

class Test {

  private readonly string _testString {get;}


  public Test(string tstSrting) 
      => _testString = tstSrting ;
}

We may be going off topic though. As I understand objects in typescript/js are explicitly mutable as expected to be via the interpertor. But will try and play with it.



I think you would want to use an init only property for your example

    class Test {
        public string Test { get; init; }
    }
I'm not a C# expert though, and there seems to be many ways to do the same thing.


I don't use the init decorator myself but I would hazard a guess it's similar. Don't quote me on that though.

The point does stand though, outside of modifying properties I'm not sure what a "private" class itself achieves.


> I don't use the init decorator myself but I would hazard a guess it's similar.

Genuinely curious, why not? Seems to be less verbose. I don’t write C#s so I’m not sure of the downsides of any particular feature.




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