<PackageReference Include="System.Configuration.ConfigurationManager" Version="5.0.0-preview.2.20160.6" />

ConfigurationAllowExeDefinition

Specifies the locations within the configuration-file hierarchy that can set or override the properties contained within a ConfigurationSection object.
namespace System.Configuration { public enum ConfigurationAllowExeDefinition { MachineOnly = 0, MachineToApplication = 100, MachineToRoamingUser = 200, MachineToLocalUser = 300 } }