<PackageReference Include="System.Security.AccessControl" Version="6.0.1" />

KnownAce

public abstract class KnownAce : GenericAce
using System.Runtime.CompilerServices; using System.Security.Principal; namespace System.Security.AccessControl { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] public abstract class KnownAce : GenericAce { public int AccessMask { get { throw new PlatformNotSupportedException(System.SR.PlatformNotSupported_AccessControl); } set { throw new PlatformNotSupportedException(System.SR.PlatformNotSupported_AccessControl); } } public SecurityIdentifier SecurityIdentifier { get { throw new PlatformNotSupportedException(System.SR.PlatformNotSupported_AccessControl); } set { throw new PlatformNotSupportedException(System.SR.PlatformNotSupported_AccessControl); } } internal KnownAce() { throw new PlatformNotSupportedException(System.SR.PlatformNotSupported_AccessControl); } } }