[SOLVED]Readonly Nullable

Question

Is there a way to implement double as readonly and nullable like in the Code below?

Nullable<readonly double> example;

This code isn't working.
Thanks for you answers!

Answer 1

Thank you very much!

Answer 2

Jamie💐
Unfortunately neither were accepted as I checked in Playground, dunno why.

Answer 3

Jamie💐
I copy and pasted those lines in Playground (in Main of a new C# code), and I only removed the "or" in between; and I got warning for both lines ...

Answer 4

Jamie💐
Looks like I need to have another go on readonly articles, I thought only static readonly is like that 👌