MA0182: FP when type is only used in type check

[drieseng]

Version of the Meziantou.Analyzer NuGet package

3.0.48

Rule Identifier

MA0182

Target Framework

.NET 10

C# Language version

c# 13

Description

MA0182 is reported when an internal class or interface is only ever used in a type check:

public sealed class Foo
{
    public static string? Run(object x)
    {
        if (x is IRunnable)
        {
            return null;
        }

        return "X";
    }
}

internal interface IRunnable
{
    void Run();
}

Not sure if this is intentional or not.
Removing the type would result in a build failure, but I'm ok if you consider this by design.

[meziantou]

C# offers several ways to reference a type 😉
Feel free to report any other cases you come across!