NetworkInformationPermission.Intersect Method (IPermission)

 

Creates and returns a permission that is the intersection of the current permission and the specified permission.

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

public override IPermission Intersect(
	IPermission target
)

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.

Exception Condition
ArgumentException

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 = 
    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));
System.Net.NetworkInformation.NetworkInformationPermission intersectPermission =
   (System.Net.NetworkInformation.NetworkInformationPermission) read.Intersect(unrestricted);

.NET Framework
Available since 2.0
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