https://bugs.winehq.org/show_bug.cgi?id=24190
--- Comment #13 from Esme Povirk madewokherd@gmail.com --- Actually, I guess there is supposed to be an actual implementation. Sort of. It's an empty method on the class that gets implemented by com interop code.
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.InternalCall)] [return: System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.BStr)] public virtual extern string IWMPStringCollection2_Item([System.Runtime.InteropServices.In] int lIndex);
But this isn't IWMPStringCollection_Item. In C# interface terms, that's a different method, because COM interop interfaces have to duplicate inherited methods.
This needs testing to figure out exactly why .NET Framework accepts this.