<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