I have a project that I publish as **MyNuget** package in a local feed. The project references a **ThirdPartyNuget** that has `ThirdPartyExtensions` public static class with public extension methods over `IQueryable`.

Now, in my main solution I reference **MyNuget** and DO NOT reference **ThirdPartyNuget**. Still, Visual Studio 2022 shows the extensions methods from `ThirdPartyExtensions`. Why?

I do not expect this as I consider **ThirdPartyNuget** the implementation detail of **MyNuget**.

The assemblies in **ThirdPartyNuget** are obfuscated and `ThirdPartyExtensions` class looks weird as it has no namespace. Here is what I see in the debugger:

```
typeof(ThirdPartyExtensions).Name == typeof(ThirdPartyExtensions).FullName == "ThirdPartyExtensions"
typeof(ThirdPartyExtensions).Namespace == null
typeof(ThirdPartyExtensions).GUID == {00000000-0000-0000-0000-000000000000}

```

What's the mechanics of this behavior?

How do I hide the visibility of `ThirdPartyExtensions`  in my main solution?