I would disagree with that statement. Nuget packages make it incredibly easy to use other people's code in C#. You add the package, and it's ready to be referenced. Automatically pulls it in on builds, too.
Sure, I can agree with that, but that doesn't exactly impact the ease of using other people's code. The availability of said code? Definitely. The ease in which you can use it? I'd give that to C# just because of not having to download the libraries and keep them up to date yourself.