USP0019.md

USP0019 Don't flag private methods decorated with PreserveAttribute or UsedImplicitlyAttribute as unused

Methods decorated with PreserveAttribute or UsedImplicitlyAttribute attributes are not unused.

Suppressed Diagnostic ID

IDE0051 - Remove unused private members

Examples of code that produces a suppressed diagnostic

using UnityEngine;
using UnityEgine.Scripting;

class Loader
{
    [PreserveAttribute]
    private void InvokeMe()
    {
    }

    public string Name; // "InvokeMe" serialized
    private void Update() {
        Invoke(Name, 0);
    }
}

Why is the diagnostic reported?

The IDE cannot find any references to the method InvokeMe and believes it to be unused.

Why do we suppress this diagnostic?

Even though the IDE cannot find any references to InvokeMe , it will be called by Unity, and should not be removed.