System.Runtime by Microsoft

<PackageReference Include="System.Runtime" Version="4.0.21-beta-23409" />

 EditorBrowsableState

public enum EditorBrowsableState
Specifies the browsable state of a property or method from within an editor.

The property or method is a feature that only advanced users should see. An editor can either show or hide such properties.

Always = 0

The property or method is always browsable from within an editor.

Never = 1

The property or method is never browsable from within an editor.