CS1591 - False positive for interface-implementing member

[ErikWe]

CS1591 - Missing XML comment for publicly visible type or member 'Type_or_Member'
Version - MSBuild 17.4.0.51802

Brief description

Members that implement an interface member will implicitly apply /// <inheritdoc/> (source) - and this works as expected. However, CS1591 is still issued for such members (unless /// <inheritdoc/> is explicitly added).

Sample

Hovering Foo.Bar in the following sample displays The bar. - but CS1591 is also issued for Foo.Bar.

// in .csproj: <GenerateDocumentationFile>true</GenerateDocumentationFile>

public interface IFoo
{
    /// <summary>The bar.</summary>
    int Bar { get; }
}

public class Foo : IFoo
{
    public int Bar => 2;
}

[CyrusNajmabadi]

That inheritdoc behavior is purely an IDE-time thing to help with features like quick-info. It's not a feature of the language, and docs are not inherited as far as the compiler and the rules around doc files are concerned. So the compiler is working as intended here.