IFluentInterface no longer appears to work in recent versions of Visual Studio (e. g. 15.5.2)

[stakx]

TL;DR: This is likely caused by a Roslyn bug; see dotnet/roslyn#4434.

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I've noticed for a while now that letting an interface inherit from IFluentInterface no longer appears to result in System.Object members being hidden in IntelliSense in recent versions of Visual Studio.

For example, here's a screenshot of a solution in Visual Studio Community 2017 (version 15.5.2) using Moq (which gets imported in the standard fashion, i. e. as a NuGet package):

My IntelliSense options are as follows:

Visual Studio's support for [EditorBrowsable] isn't generally broken—other members are still properly hidden, e. g.:

• Moq.Mock.Expect (method marked with EditorBrowsableState.Never)
• Moq.Internals.InterfaceProxy (type marked with EditorBrowsableState.Never)
• Moq.LookupOrFallbackDefaultValueProvider (type marked with EditorBrowsableState.Advanced)

Can you confirm that this is a problem with current versions of Visual Studio?

[stakx]

I can actually confirm this myself: This is most likely due to a Roslyn bug; see dotnet/roslyn#4434.

I think it might be helpful to leave this present issue open to raise awareness about the real problem, until that has been fixed.