NetworkInformationPermission.IsSubsetOf Method (IPermission)


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Determines whether the current permission is a subset of the specified permission.

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

public override bool IsSubsetOf(
	IPermission target


Type: System.Security.IPermission

An IPermission that is to be tested for the subset relationship. This permission must be of the same type as the current permission

Return Value

Type: System.Boolean

true if the current permission is a subset of the specified permission; otherwise, false.

The current permission is a subset of the specified permission if the current permission specifies a state that is wholly contained by the specified permission. If this method returns true, the current permission represents no more access to the protected resource than does the specified permission.

The following code example displays the subset relationship between two permissions.

System.Net.NetworkInformation.NetworkInformationPermission unrestricted = 
    new System.Net.NetworkInformation.NetworkInformationPermission(

Console.WriteLine("Is unrestricted? " + unrestricted.IsUnrestricted());

System.Net.NetworkInformation.NetworkInformationPermission read = 
    new System.Net.NetworkInformation.NetworkInformationPermission(
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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