NetworkInformationPermission.Union Method (IPermission)

 

Creates a permission that is the union of this permission and the specified permission.

Namespace:   System.Net.NetworkInformation
Assembly:  System (in System.dll)

public override IPermission Union(
	IPermission target
)

Parameters

target
Type: System.Security.IPermission

A NetworkInformationPermission permission to combine with the current permission.

Return Value

Type: System.Security.IPermission

A new permission that represents the union of the current permission and the specified permission.

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.

The following example creates a permission object that is the union of existing permission objects.

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));

.NET Framework
Available since 2.0
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