<PackageReference Include="System.Security.Permissions" Version="9.0.0-preview.3.24172.9" />

API Differences between 9.0.0-preview.3.24172.9 and 4.6.0-preview7.19362.9

28 Additions 4 Removals

System.DirectoryServices

System.Security.Policy

System.Xaml.Permissions