<PackageReference Include="System.Security.Permissions" Version="6.0.0-preview.2.21154.6" />
API Differences between 6.0.0-preview.2.21154.6 and 4.4.0-preview2-25405-01
122 Additions
4 Removals
System.Configuration
System.Security
System.Security.Permissions
System.ServiceProcess
System.Web
System.Xaml.Permissions