NetworkInformationPermission::Intersect Method (IPermission^)
Creates and returns a permission that is the intersection of the current permission and the specified permission.
Assembly: System (in System.dll)
Parameters
- target
-
Type:
System.Security::IPermission^
An IPermission to intersect with the current permission. It must be of the same type as the current permission.
Return Value
Type: System.Security::IPermission^A NetworkInformationPermission that represents the intersection of the current permission and the specified permission. This new permission is null if the intersection is empty or target is null.
Implements
IPermission::Intersect(IPermission^)| Exception | Condition |
|---|---|
| ArgumentException | target is not a NetworkInformationPermission. |
The intersection of two permissions is a permission that describes the state they both describe in common. Only a demand that passes both original permissions will pass the intersection.
The following example creates a permission object that is the intersection of existing permission objects.
System::Net::NetworkInformation::NetworkInformationPermission^ unrestricted = gcnew System::Net::NetworkInformation::NetworkInformationPermission( System::Security::Permissions::PermissionState::Unrestricted ); Console::WriteLine( L"Is unrestricted? {0}", unrestricted->IsUnrestricted() ); System::Net::NetworkInformation::NetworkInformationPermission^ read = gcnew System::Net::NetworkInformation::NetworkInformationPermission( System::Net::NetworkInformation::NetworkInformationAccess::Read ); System::Net::NetworkInformation::NetworkInformationPermission^ copyPermission = dynamic_cast<System::Net::NetworkInformation::NetworkInformationPermission^>(read->Copy()); System::Net::NetworkInformation::NetworkInformationPermission^ unionPermission = dynamic_cast<System::Net::NetworkInformation::NetworkInformationPermission^>(read->Union( unrestricted )); Console::WriteLine( L"Is subset?{0}", read->IsSubsetOf( unionPermission ) ); System::Net::NetworkInformation::NetworkInformationPermission^ intersectPermission = dynamic_cast<System::Net::NetworkInformation::NetworkInformationPermission^>(read->Intersect( unrestricted ));
Available since 2.0