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

System.Runtime.CompilerServices.NullablePublicOnlyAttribute

namespace System.Runtime.CompilerServices { internal sealed class NullablePublicOnlyAttribute : Attribute { public readonly bool IncludesInternals; public NullablePublicOnlyAttribute(bool P_0); } }