ZoneIdentityPermission Class

Defines the identity permission for the zone from which the code originates. This class cannot be inherited.

Namespace: System.Security.Permissions
Assembly: mscorlib (in mscorlib.dll)

'Declaration
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public NotInheritable Class ZoneIdentityPermission
	Inherits CodeAccessPermission
'Usage
Dim instance As ZoneIdentityPermission

/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public final class ZoneIdentityPermission extends CodeAccessPermission
SerializableAttribute 
ComVisibleAttribute(true) 
public final class ZoneIdentityPermission extends CodeAccessPermission

This permission can determine whether calling code is from a certain zone. Zones are configured according to the Microsoft Internet Explorer options, and are mapped from URL by Internet Explorer's IInternetSecurityManager and related APIs. Only exact zone matches are defined for the permission; a URL can only belong to one zone.

  • Local intranet zone: The Local intranet zone is used for content located on a company's intranet. Because the servers are within a company's firewall, content on the intranet is assigned a higher level of trust.

  • Trusted sites zone: The Trusted sites zone is used for content located on Web sites that are considered more reputable or trustworthy than other sites on the Internet. Users can use this zone to assign a higher level of trust to specific Internet sites. The URLs of these trusted Web sites need to be mapped into this zone by the user. By default, sites in the Trusted sites zone receive no higher trust than those in the Internet zone. A user or company needs to change the level of trust granted to this zone if they want the sites it contains to be given a higher level of trust.

  • Internet zone: The Internet zone is used for the Web sites on the Internet that do not belong to another zone. The default settings allow code downloaded from these sites only minimal access to resources on the user's computer. Web sites that are not mapped into other zones automatically fall into this zone.

  • Restricted sites zone: The Restricted sites zone is used for Web sites that contain content that could cause, or could have previously caused, problems when downloaded. This zone could be used to prevent code downloaded from these sites from running on the user's computer. The URLs of these untrusted Web sites need to be mapped into this zone by the user.

  • Local Machine zone: The Local Machine zone is an implicit zone that is used for content that exists on the user's computer. The content found on the user's computer, except for content cached by Internet Explorer on the local system, is treated with a very high level of trust.

NoteNote

In the .NET Framework versions 1.0 and 1.1, identity permissions cannot have an Unrestricted permission state value. In the .NET Framework version 2.0, identity permissions can have any permission state value. This means that in version 2.0, identity permissions have the same behavior as permissions that implement the IUnrestrictedPermission interface. For information on executing version 2.0 applications with version 1.1 CAS policy, see <legacyV1CASPolicy> Element.

Imports System
Imports System.Security
Imports System.Security.Permissions
Imports Microsoft.VisualBasic

Module Module1

    Public Class ZoneIdentityDemo

        ' IsSubsetOf determines whether the current permission is a subset of the specified permission.
        Private Function IsSubsetOfDemo() As Boolean
            Dim returnValue As Boolean = True
            Dim zone1, zone2 As SecurityZone
            Dim zoneIdPerm1, zoneIdPerm2 As ZoneIdentityPermission
            Dim zoneGen1 As New zoneGenerator()
            Dim zoneGen2 As New zoneGenerator()
            zoneGen1.ResetIndex()
            While zoneGen1.CreateZone(zone1)
                zoneIdPerm1 = New ZoneIdentityPermission(zone1)
                zoneGen2.ResetIndex()
                Console.WriteLine("********************************************************" & ControlChars.Cr)

                While zoneGen2.CreateZone(zone2)
                    zoneIdPerm2 = New ZoneIdentityPermission(zone2)
                    Try
                        If zoneIdPerm1.IsSubsetOf(zoneIdPerm2) Then
                            Console.WriteLine((zoneIdPerm1.SecurityZone.ToString() & _
                            " is a subset of " & zoneIdPerm2.SecurityZone.ToString()))
                        Else
                            Console.WriteLine((zoneIdPerm1.SecurityZone.ToString() & _
                            " is not a subset of " & zoneIdPerm2.SecurityZone.ToString()))
                        End If
                    Catch e As Exception
                        Console.WriteLine(("An exception was thrown for subset :" & _
                        zoneIdPerm1.ToString() & ControlChars.Cr & zoneIdPerm2.ToString() & _
                        ControlChars.Cr & e.ToString()))
                        returnValue = False
                    End Try
ContinueWhile2:
                End While
ContinueWhile1:
            End While
            Return returnValue
        End Function 'IsSubsetOfDemo

        ' Union creates a new permission that is the union of the current permission and the specified permission.
        Private Function UnionDemo() As Boolean
            Dim returnValue As Boolean = True
            Dim zone1, zone2 As SecurityZone
            Dim zoneIdPerm1, zoneIdPerm2 As ZoneIdentityPermission
            Dim zoneIdPerm3 As IPermission
            Dim zoneGen1 As New ZoneGenerator()
            Dim zoneGen2 As New ZoneGenerator()
            zoneGen1.ResetIndex()
            While zoneGen1.CreateZone(zone1)
                zoneIdPerm1 = New ZoneIdentityPermission(zone1)
                Console.WriteLine("**********************************************************" & ControlChars.Cr)
                zoneGen2.ResetIndex()

                Try
                    While zoneGen2.CreateZone(zone2)
                        zoneIdPerm2 = New ZoneIdentityPermission(zone2)
                        zoneIdPerm3 = CType(zoneIdPerm1.Union(zoneIdPerm2), ZoneIdentityPermission)
                        zoneIdPerm3 = zoneIdPerm1.Union(zoneIdPerm2)

                        If zoneIdPerm3 Is Nothing Then
                            Console.WriteLine(("The union of " & zone1.ToString() & " and " & _
                            zone2.ToString() & " is null."))
                        Else
                            Console.WriteLine(("The union of " & zoneIdPerm1.SecurityZone.ToString() & " and " _
                            & zoneIdPerm2.SecurityZone.ToString() & " = " _
                            & CType(zoneIdPerm3, Object).SecurityZone.ToString()))
                        End If
ContinueWhile2:
                    End While
                Catch e As Exception
                    Console.WriteLine(e.Message)
                End Try

ContinueWhile1:
            End While


            Return returnValue
        End Function 'UnionDemo

        ' Intersect creates and returns a new permission that is the intersection of the current 
        ' permission and the permission specified.
        Private Function IntersectDemo() As Boolean
            Dim returnValue As Boolean = True
            Dim zone1, zone2 As SecurityZone
            Dim zoneIdPerm1, zoneIdPerm2, zoneIdPerm3 As ZoneIdentityPermission
            Dim zoneGen1 As New ZoneGenerator()
            Dim zoneGen2 As New ZoneGenerator()
            zoneGen1.ResetIndex()
            While zoneGen1.CreateZone(zone1)
                zoneIdPerm1 = New ZoneIdentityPermission(zone1)
                Console.WriteLine("**********************************************************" & ControlChars.Cr)
                zoneGen2.ResetIndex()

                While zoneGen2.CreateZone(zone2)
                    zoneIdPerm2 = New ZoneIdentityPermission(zone2)
                    zoneIdPerm3 = CType(zoneIdPerm1.Intersect(zoneIdPerm2), ZoneIdentityPermission)
                    If Not (zoneIdPerm3 Is Nothing) Then
                        Console.WriteLine(("The intersection of " & zone1.ToString() & " and " & _
                        zone2.ToString() & " = " & CType(zoneIdPerm3, Object).SecurityZone.ToString()))
                    Else
                        Console.WriteLine(("The intersection of " & zone1.ToString() & " and " & _
                        zone2.ToString() & " is null."))
                    End If
ContinueWhile2:
                End While
ContinueWhile1:
            End While

            Return returnValue
        End Function 'IntersectDemo

        'Copy creates and returns an identical copy of the current permission.
        Private Function CopyDemo() As Boolean

            Dim returnValue As Boolean = True

            Dim zone1 As SecurityZone
            Dim zoneIdPerm1, zoneIdPerm2 As ZoneIdentityPermission

            Dim zoneGen1 As New ZoneGenerator()
            Dim zoneGen2 As New ZoneGenerator()

            zoneGen1.ResetIndex()
            While zoneGen1.CreateZone(zone1)
                zoneIdPerm1 = New ZoneIdentityPermission(zone1)

                zoneGen2.ResetIndex()
                Console.WriteLine("********************************************************" & ControlChars.Cr)
                Try
                    zoneIdPerm2 = CType(zoneIdPerm1.Copy(), ZoneIdentityPermission)
                    Console.WriteLine(("Result of copy = " & zoneIdPerm2.ToString()))

                Catch e As Exception
                    Console.WriteLine(("Copy failed :" & zoneIdPerm1.ToString() & e.ToString()))
                    GoTo ContinueWhile1
                End Try
ContinueWhile1:
            End While
            Return returnValue
        End Function 'CopyDemo

        ' ToXml creates an XML encoding of the permission and its current state; 
        ' FromXml reconstructs a permission with the specified state from the XML encoding. 
        Private Function ToFromXmlDemo() As Boolean

            Dim returnValue As Boolean = True

            Dim zone1 As SecurityZone
            Dim zoneIdPerm1, zoneIdPerm2 As ZoneIdentityPermission
            Dim zoneGen1 As New ZoneGenerator()
            Dim zoneGen2 As New ZoneGenerator()
            zoneGen1.ResetIndex()
            While zoneGen1.CreateZone(zone1)
                zoneIdPerm1 = New ZoneIdentityPermission(zone1)
                Console.WriteLine("********************************************************" & ControlChars.Cr)
                zoneGen2.ResetIndex()
                Try
                    zoneIdPerm2 = New ZoneIdentityPermission(PermissionState.None)
                    zoneIdPerm2.FromXml(zoneIdPerm1.ToXml())
                    Console.WriteLine(("Result of ToFromXml = " & zoneIdPerm2.ToString()))

                Catch e As Exception
                    Console.WriteLine(("ToFromXml failed :" & zoneIdPerm1.ToString() & e.ToString()))
                    GoTo ContinueWhile1
                End Try
ContinueWhile1:
            End While

            Return returnValue
        End Function 'ToFromXmlDemo

        ' Invoke all demos.
        Public Function RunDemo() As Boolean
            Dim returnCode As Boolean = True
            Dim tempReturnCode As Boolean

            ' Call the IsSubsetOf demo.
            If IsSubsetOfDemo() Then
                Console.Out.WriteLine("IsSubsetOf demo completed successfully.")
                tempReturnCode = True
            Else
                Console.Out.WriteLine("IsSubsetOf demo failed.")
                tempReturnCode = False
            End If
            returnCode = tempReturnCode And returnCode

            ' Call the Union demo.
            If UnionDemo() Then
                Console.Out.WriteLine("Union demo completed successfully.")
                tempReturnCode = True
            Else
                Console.Out.WriteLine("Union demo failed.")
                tempReturnCode = False
            End If
            returnCode = tempReturnCode And returnCode

            ' Call the Intersect demo.	
            If IntersectDemo() Then
                Console.Out.WriteLine("Intersect demo completed successfully.")
                tempReturnCode = True
            Else
                Console.Out.WriteLine("Intersect demo failed.")
                tempReturnCode = False
            End If
            returnCode = tempReturnCode And returnCode


            ' Call the Copy demo.	
            If CopyDemo() Then
                Console.Out.WriteLine("Copy demo completed successfully.")
                tempReturnCode = True
            Else
                Console.Out.WriteLine("Copy demo failed.")
                tempReturnCode = False
            End If
            returnCode = tempReturnCode And returnCode

            ' Call the ToFromXml demo.	
            If ToFromXmlDemo() Then
                Console.Out.WriteLine("ToFromXml demo completed successfully.")
                tempReturnCode = True
            Else
                Console.Out.WriteLine("ToFromXml demo failed.")
                tempReturnCode = False
            End If
            returnCode = tempReturnCode And returnCode

            Return returnCode
        End Function

        ' Test harness.
        Public Overloads Shared Sub Main(ByVal args() As [String])
            Try
                Dim democase As New ZoneIdentityDemo()
                Dim returnCode As Boolean = democase.RunDemo()
                If returnCode Then
                    Console.Out.WriteLine("ZoneIdentityPermission demo completed successfully.")
                    Console.Out.WriteLine("Press the Enter key to exit.")
                    Dim consoleInput As String = Console.ReadLine()
                    System.Environment.ExitCode = 100
                Else
                    Console.Out.WriteLine("ZoneIdentityPermission demo failed.")
                    Console.Out.WriteLine("Press the Enter key to exit.")
                    Dim consoleInput As String = Console.ReadLine()
                    System.Environment.ExitCode = 101
                End If
            Catch e As Exception
                Console.Out.WriteLine("ZoneIdentityPermission demo failed.")
                Console.WriteLine(e.ToString())
                Console.Out.WriteLine("Press the Enter key to exit.")
                Dim consoleInput As String = Console.ReadLine()
                System.Environment.ExitCode = 101
            End Try
        End Sub 'Main
    End Class 'ZoneIdentityDemo
 _


    ' This class generates ZoneIdentityPermission objects.
    Friend Class ZoneGenerator


        Private myZone As SecurityZone() = {SecurityZone.NoZone, _
        SecurityZone.Internet, _
        SecurityZone.Intranet, _
        SecurityZone.MyComputer, _
        SecurityZone.Untrusted, _
        SecurityZone.Trusted}

        Private zoneIndex As Integer = 0


        Public Sub New()
            ResetIndex()
        End Sub 'New


        Public Sub ResetIndex()
            zoneIndex = 0
        End Sub 'ResetIndex

        ' CreateZone creates ZoneIdentityPermission objects.
        Public Function CreateZone(ByRef zone As SecurityZone) As Boolean

            If zoneIndex >= myZone.Length Then

                zone = SecurityZone.NoZone
                zoneIndex = zoneIndex + 1
                Return False
            End If
            zone = myZone(zoneIndex)
            zoneIndex = zoneIndex + 1
            Return True

        End Function 'CreateZone
    ' End of ZoneGenerator.
End Module

// This sample demonstrates the IsSubsetOf, Union, Intersect,
// Copy, ToXml and FromXml methods
// of the ZoneIdentityPermission class.
import System.*;
import System.Security.*;
import System.Security.Permissions .* ;

/** @assembly CLSCompliant(true)
 */

public class ZoneIdentityDemo
{
    // IsSubsetOf determines whether the current permission
    // is a subset of the specified permission.
    private boolean IsSubsetOfDemo()
    {
        boolean returnValue = true;
        SecurityZone zone1[] = new SecurityZone[1];
        SecurityZone zone2[] = new SecurityZone[1];
        ZoneIdentityPermission zoneIdPerm1[] = new ZoneIdentityPermission[1];
        ZoneIdentityPermission zoneIdPerm2[] = new ZoneIdentityPermission[1];
        ZoneGenerator zoneGen1 = new ZoneGenerator();
        ZoneGenerator zoneGen2 = new ZoneGenerator();

        zoneGen1.ResetIndex();
        while (zoneGen1.CreateZone(zoneIdPerm1, zone1)) {
            if (zoneIdPerm1[0] == null) {
                continue;
            }
            zoneGen2.ResetIndex();
            Console.WriteLine("****************************" 
                + "****************************\n");
            while (zoneGen2.CreateZone(zoneIdPerm2, zone2)) {
                if (zoneIdPerm2[0] == null) {
                    continue;
                }

                try {
                    if (zoneIdPerm1[0].IsSubsetOf(zoneIdPerm2[0])) {
                        Console.WriteLine((zoneIdPerm1[0].get_SecurityZone() 
                            + " is a subset of " 
                            + zoneIdPerm2[0].get_SecurityZone()));
                    }
                    else {
                        Console.WriteLine((zoneIdPerm1[0].get_SecurityZone() 
                            + " is not a subset of " + 
                        zoneIdPerm2[0].get_SecurityZone()));
                    }
                }
                catch (System.Exception e) {
                    Console.WriteLine(("An exception was thrown for subset :" 
                        + zoneIdPerm1[0] + "\n" + zoneIdPerm2[0] + "\n" + e));
                    returnValue = false;
                }
            }
        }
        return returnValue;
    } //IsSubsetOfDemo

    // Union creates a new permission that is the union of the
    // current permission and the specified permission.
    private boolean UnionDemo()
    {
        boolean returnValue = true;
        SecurityZone zone1[] = new SecurityZone[1];
        SecurityZone zone2[] = new SecurityZone[1];
        ZoneIdentityPermission zoneIdPerm1[] = new ZoneIdentityPermission[1];
        ZoneIdentityPermission zoneIdPerm2[] = new ZoneIdentityPermission[1];
        IPermission zoneIdPerm3;
        ZoneGenerator zoneGen1 = new ZoneGenerator();
        ZoneGenerator zoneGen2 = new ZoneGenerator();

        zoneGen1.ResetIndex();
        while (zoneGen1.CreateZone(zoneIdPerm1, zone1)) {
            if (zoneIdPerm1[0] == null) {
                continue;
            }
            Console.WriteLine("***************************************" 
                + "*******************\n");
            zoneGen2.ResetIndex();
            while (zoneGen2.CreateZone(zoneIdPerm2, zone2)) {
                if (zoneIdPerm2[0] == null) {
                    continue;
                }
                zoneIdPerm3 = ((ZoneIdentityPermission)(zoneIdPerm1[0].
                    Union(zoneIdPerm2[0])));
                zoneIdPerm3 = zoneIdPerm1[0].Union(zoneIdPerm2[0]);
                if (zoneIdPerm3 == null) {
                    Console.WriteLine(("The union of " + zone1[0] + " and " 
                        + zone2[0] + " is null."));
                }
                else {
                    Console.WriteLine(("The union of " + zoneIdPerm1[0].
                    get_SecurityZone() + " and " 
                        + zoneIdPerm2[0].get_SecurityZone() + " = " 
                        + ((ZoneIdentityPermission)(zoneIdPerm3)).
                        get_SecurityZone().ToString()));
                }
            }
        }
        return returnValue;
    } //UnionDemo

    // Intersect creates and returns a new permission that
    // is the intersection of the current
    // permission and the permission specified.
    private boolean IntersectDemo()
    {
        boolean returnValue = true;
        SecurityZone zone1[] = new SecurityZone[1];
        SecurityZone zone2[] = new SecurityZone[1];
        ZoneIdentityPermission zoneIdPerm1[] = new ZoneIdentityPermission[1];
        ZoneIdentityPermission zoneIdPerm2[] = new ZoneIdentityPermission[1];
        ZoneIdentityPermission zoneIdPerm3 = null;
        ZoneGenerator zoneGen1 = new ZoneGenerator();
        ZoneGenerator zoneGen2 = new ZoneGenerator();

        zoneGen1.ResetIndex();
        while (zoneGen1.CreateZone(zoneIdPerm1, zone1)) {
            if (zoneIdPerm1[0] == null) {
                continue;
            }
            Console.WriteLine("**********************************" 
                + "************************\n");
            zoneGen2.ResetIndex();
            while (zoneGen2.CreateZone(zoneIdPerm2, zone2)) {
                if (zoneIdPerm2[0] == null) {
                    continue;
                }
                zoneIdPerm3 = ((ZoneIdentityPermission)(zoneIdPerm1[0].
                    Intersect(zoneIdPerm2[0])));
                if (zoneIdPerm3 != null) {
                    Console.WriteLine(("The intersection of " + zone1[0] 
                        + " and " + zone2[0] + " = " + 
                        ((ZoneIdentityPermission)(zoneIdPerm3)).
                        get_SecurityZone().ToString()));
                }
                else {
                    Console.WriteLine(("The intersection of " + zone1[0] 
                        + " and " + zone2[0] + " is null."));
                }
            }
        }
        return returnValue;
    } //IntersectDemo

    //Copy creates and returns an identical copy of the current permission.
    private boolean CopyDemo()
    {
        boolean returnValue = true;
        SecurityZone zone1[] = new SecurityZone[1];
        ZoneIdentityPermission zoneIdPerm1[] = new ZoneIdentityPermission[1];
        ZoneIdentityPermission zoneIdPerm2 = null;
        ZoneGenerator zoneGen1 = new ZoneGenerator();
        ZoneGenerator zoneGen2 = new ZoneGenerator();

        zoneGen1.ResetIndex();
        while (zoneGen1.CreateZone(zoneIdPerm1, zone1)) {
            if (zoneIdPerm1[0] == null) {
                continue;
            }
            zoneGen2.ResetIndex();
            Console.WriteLine("**********************************" 
                + "**********************\n");
            try {
                zoneIdPerm2 = ((ZoneIdentityPermission)(zoneIdPerm1[0].Copy()));
                Console.WriteLine(("Result of copy = " 
                    + zoneIdPerm2.ToString()));
            }
            catch (System.Exception e) {
                Console.WriteLine(("Copy failed :" 
                    + zoneIdPerm1[0].ToString() + e));
                continue;
            }
        }
        return returnValue;
    } //CopyDemo

    // ToXml creates an XML encoding of the permission and its current state;
    // FromXml reconstructs a permission with the specified 
    // state from the XML encoding.
    private boolean ToFromXmlDemo()
    {
        boolean returnValue = true;
        SecurityZone zone1[] = new SecurityZone[1];
        ZoneIdentityPermission zoneIdPerm1[] = new
        ZoneIdentityPermission[1];
        ZoneIdentityPermission zoneIdPerm2 = null;
        ZoneGenerator zoneGen1 = new ZoneGenerator();
        ZoneGenerator zoneGen2 = new ZoneGenerator();

        zoneGen1.ResetIndex();
        while (zoneGen1.CreateZone(zoneIdPerm1, zone1)) {
            if (zoneIdPerm1[0] == null) {
                continue;
            }
            Console.WriteLine("*********************************" 
                + "***********************\n");
            zoneGen2.ResetIndex();
            try {
                zoneIdPerm2 = new ZoneIdentityPermission(PermissionState.None);
                zoneIdPerm2.FromXml(zoneIdPerm1[0].ToXml());
                Console.WriteLine(("Result of ToFromXml = " 
                    + zoneIdPerm2.ToString()));
            }
            catch (System.Exception e) {
                Console.WriteLine(("ToFromXml failed :" 
                    + zoneIdPerm1[0].ToString() + e));
                continue;
            }
        }
        return returnValue;
    } //ToFromXmlDemo

    // Invoke all demos.
    public boolean RunDemo()
    {
        boolean returnCode = true;
        boolean tempReturnCode;

        // Call the IsSubsetOf demo.
        if (tempReturnCode = IsSubsetOfDemo()) {
            Console.get_Out().WriteLine("IsSubsetOf demo " 
                + "completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("IsSubsetOf demo failed.");
        }
        returnCode = tempReturnCode && returnCode;

        // Call the Union demo.
        if (tempReturnCode = UnionDemo()) {
            Console.get_Out().WriteLine("Union demo completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("Union demo failed.");
        }

        returnCode = tempReturnCode && returnCode;

        // Call the Intersect demo.
        if (tempReturnCode = IntersectDemo()) {
            Console.get_Out().WriteLine("Intersect demo " 
                + " completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("Intersect demo failed.");
        }
        returnCode = tempReturnCode && returnCode;

        // Call the Copy demo.
        if (tempReturnCode = CopyDemo()) {
            Console.get_Out().WriteLine("Copy demo completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("Copy demo failed.");
        }
        returnCode = tempReturnCode && returnCode;

        // Call the ToFromXml demo.
        if (tempReturnCode = ToFromXmlDemo()) {
            Console.get_Out().WriteLine("ToFromXml demo " 
                + "completed successfully.");
        }
        else {
            Console.get_Out().WriteLine("ToFromXml demo failed.");
        }
        returnCode = tempReturnCode && returnCode;
        return returnCode;
    } //RunDemo

    // Test harness.
    public static void main(String[] args)
    {
        try {
            ZoneIdentityDemo democase = new ZoneIdentityDemo();
            boolean returnCode = democase.RunDemo();
            if (returnCode) {
                Console.get_Out().WriteLine("ZoneIdentityPermission" 
                    + " demo completed successfully.");
                Console.get_Out().WriteLine("Press the Enter key to exit.");
                String consoleInput = Console.ReadLine();
                Environment.set_ExitCode(100);
            }
            else {
                Console.get_Out().WriteLine("ZoneIdentityPermission" 
                    + " demo failed.");
                Console.get_Out().WriteLine("Press the Enter key to exit.");
                String consoleInput = Console.ReadLine();
                Environment.set_ExitCode(101);
            }
        }
        catch (System.Exception e) {
            Console.get_Out().WriteLine("ZoneIdentityPermission demo failed.");
            Console.WriteLine(e.ToString());
            Console.get_Out().WriteLine("Press the Enter key to exit.");
            String consoleInput = Console.ReadLine();
            Environment.set_ExitCode(101);
        }
    } //main
} //ZoneIdentityDemo

// This class generates ZoneIdentityPermission objects.
class ZoneGenerator
{
    private SecurityZone myZone[] =  { 
        SecurityZone.NoZone, SecurityZone.Internet, SecurityZone.Intranet, 
        SecurityZone.MyComputer, SecurityZone.Untrusted, SecurityZone.Trusted };

    private int zoneIndex = 0;

    public ZoneGenerator()
    {
        ResetIndex();
    } //ZoneGenerator

    public void ResetIndex()
    {
        zoneIndex = 0;
    } //ResetIndex

    // CreateZone creates ZoneIdentityPermission objects.
    public boolean CreateZone(ZoneIdentityPermission zonePerm[], 
        SecurityZone zone[])
    {
        if (zoneIndex >= myZone.length) {
            zonePerm[0] = new ZoneIdentityPermission(PermissionState.None);

            zone[0] = SecurityZone.NoZone;
            zoneIndex++;
            return false;
        }
        zone[0] = myZone[zoneIndex++];

        try {
            zonePerm[0] = new ZoneIdentityPermission(zone[0]);
            return true;
        }
        catch (System.Exception e) {
            Console.WriteLine(("Cannot create ZoneIdentityPermission: " 
                + zone[0] + " " + e));
            zonePerm[0] = new ZoneIdentityPermission(PermissionState.None);
            zone[0] = SecurityZone.NoZone;
            return true;
        }
    } //CreateZone
} //ZoneGenerator 

System.Object
   System.Security.CodeAccessPermission
    System.Security.Permissions.ZoneIdentityPermission

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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