How to set value of property where there is no setter

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I do not suggest doing this on your application but for testing purpose it may be usefull…

Assuming you have:

public class MyClass
{
     public int MyNumber {get;}
}

You could do this if its for test purpose, I would not suggest to use this in your runtime code:

var field = typeof(MyClass).GetField("<MyNumber>k__BackingField", BindingFlags.Instance | BindingFlags.NonPublic);
field.SetValue(anIstanceOfMyClass, 3);

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