NetworkInformationPermission.Union(IPermission) Method
Definition
Important
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Creates a permission that is the union of this permission and the specified permission.
public:
override System::Security::IPermission ^ Union(System::Security::IPermission ^ target);
public override System.Security.IPermission Union (System.Security.IPermission target);
override this.Union : System.Security.IPermission -> System.Security.IPermission
Public Overrides Function Union (target As IPermission) As IPermission
Parameters
- target
- IPermission
A NetworkInformationPermission permission to combine with the current permission.
Returns
A new permission that represents the union of the current permission and the specified permission.
Examples
The following example creates a permission object that is the union 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 unrestricted =
new System.Net.NetworkInformation.NetworkInformationPermission(
System.Security.Permissions.PermissionState.Unrestricted);
Console.WriteLine("Is unrestricted? " + unrestricted.IsUnrestricted());
System.Net.NetworkInformation.NetworkInformationPermission read =
new System.Net.NetworkInformation.NetworkInformationPermission(
System.Net.NetworkInformation.NetworkInformationAccess.Read);
System.Net.NetworkInformation.NetworkInformationPermission copyPermission =
(System.Net.NetworkInformation.NetworkInformationPermission) read.Copy();
System.Net.NetworkInformation.NetworkInformationPermission unionPermission =
(System.Net.NetworkInformation.NetworkInformationPermission) read.Union(unrestricted);
Console.WriteLine("Is subset?" + read.IsSubsetOf(unionPermission));
Dim unrestricted As New System.Net.NetworkInformation.NetworkInformationPermission( _
System.Security.Permissions.PermissionState.Unrestricted)
Console.WriteLine("Is unrestricted? " + unrestricted.IsUnrestricted().ToString())
Dim read As New System.Net.NetworkInformation.NetworkInformationPermission( _
System.Net.NetworkInformation.NetworkInformationAccess.Read)
Dim copyPermission As System.Net.NetworkInformation.NetworkInformationPermission = _
CType(read.Copy(), System.Net.NetworkInformation.NetworkInformationPermission)
Dim unionPermission As System.Net.NetworkInformation.NetworkInformationPermission = _
CType(read.Union(unrestricted), System.Net.NetworkInformation.NetworkInformationPermission)
Console.WriteLine("Is subset?" + read.IsSubsetOf(unionPermission).ToString())
Remarks
The Union method returns a permission that represents all the states represented by both the current permission and the specified permission. Any demand that passes either permission passes their union.
Applies to
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