S4022 — Enumerations should have "Int32" storage

Why is this an issue?

By default the storage type of an enum is Int32. In most cases it is not necessary to change this. In particular you will not achieve any performance gain by using a smaller data type (e.g. Byte) and may limit future uses.

Noncompliant code example

using System;

namespace MyLibrary
{
    public enum Visibility : sbyte // Noncompliant
    {
        Visible = 0,
        Invisible = 1,
    }
}

Compliant solution

using System;

namespace MyLibrary
{
    public enum Visibility
    {
        Visible = 0,
        Invisible = 1,
    }
}