pre-defined constants for non-trivial data types

Question

My Goal: Create a C# class for predefined errors that have both an ID and a Message. Here was what I tried:

public class MyError
{
    public static readonly         


        

Answer 1

Your type is not mutable, but Code Analysis doesn't know that.
This warning is a false positive; you should suppress it.

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To answer your edited question:

const can only be applied to primitives.
For custom types, static readonly is the only option.

As long as the type is properly immutable, it will work perfectly.