<PackageReference Include="System.Security.AccessControl" Version="6.0.0-rc.2.21480.5" />

System.Security.Policy.EvidenceBase

public abstract class EvidenceBase
Provides a base class from which all objects to be used as evidence must derive.
namespace System.Security.Policy { public abstract class EvidenceBase { protected EvidenceBase(); public virtual EvidenceBase Clone(); } }