How to set value of property where there is no setter

Question

I have seen various questions raised and answered where we can invoke a private setter using reflection such as this one:

Is it possible to get a property's priv

Answer 1

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("k__BackingField", BindingFlags.Instance | BindingFlags.NonPublic);
field.SetValue(anIstanceOfMyClass, 3);