<PackageReference Include="System.Security.Permissions" Version="9.0.0-preview.4.24266.19" />
API Differences between 9.0.0-preview.4.24266.19 and 4.5.0-preview1-26216-02
142 Additions
2 Removals
System.Configuration
System.DirectoryServices
System.Security.Permissions
System.Security.Policy
System.ServiceProcess
System.Web