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ReflectionPermission Class

Controls access to metadata through the System.Reflection APIs. This class cannot be inherited.

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

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public sealed class ReflectionPermission : CodeAccessPermission, IUnrestrictedPermission
/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public final class ReflectionPermission extends CodeAccessPermission implements IUnrestrictedPermission
SerializableAttribute 
ComVisibleAttribute(true) 
public final class ReflectionPermission extends CodeAccessPermission implements IUnrestrictedPermission

Type is the root of the System.Reflection functionality. Without ReflectionPermission, code can only access the public members of loaded assemblies. This includes, but is not limited to, unrestricted access to Object.GetType, access to public exported types through Type.GetType, and access to GetTypeFromHandle. Some properties of Type, such as FullName and Attributes, are accessible without ReflectionPermission.

Code with the appropriate ReflectionPermission has access to the public, protected, and even private members of any loaded Type. This includes access to Module, Assembly, BaseType, and GetInterfaces.

Caution noteCaution

Because ReflectionPermission can provide access to private class members and metadata, it is recommended that ReflectionPermission not be granted to Internet code.

using System;
using System.Security;
using System.Security.Permissions;

[assembly: CLSCompliant(true)]

public class ReflectionPermissionDemo
{
    // IsSubsetOf determines whether the current permission is a subset of the specified permission.
    private bool IsSubsetOfDemo()
    {
        bool returnValue = true;
        ReflectionPermissionFlag reflection1, reflection2;
        ReflectionPermission reflectionPerm1, reflectionPerm2;
        ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        while (reflectionGen1.CreateReflection(out reflection1))
        {
            reflectionPerm1 = new ReflectionPermission(reflection1);
            reflectionGen2.ResetIndex();
            Console.WriteLine("********************************************************\n");

            while (reflectionGen2.CreateReflection(out reflection2))
            {
                reflectionPerm2 = new ReflectionPermission(reflection2);
                try
                {
                    if (reflectionPerm1.IsSubsetOf(reflectionPerm2))
                    {
                        Console.WriteLine(reflectionPerm1.Flags + " is a subset of " +
                            reflectionPerm2.Flags);
                    }
                    else
                    {
                        Console.WriteLine(reflectionPerm1.Flags + " is not a subset of " +
                            reflectionPerm2.Flags);
                    }
                }
                catch (Exception e)
                {
                    Console.WriteLine("An exception was thrown for subset :" + reflectionPerm1 + "\n" +
                        reflectionPerm2 + "\n" + e);
                    returnValue = false;
                }
            }
        }
        return returnValue;
    }
    // Union creates a new permission that is the union of the current permission and the specified permission.
    private bool UnionDemo()
    {
        bool returnValue = true;
        ReflectionPermissionFlag reflection1, reflection2;
        ReflectionPermission reflectionPerm1, reflectionPerm2;
        IPermission reflectionPerm3;
        ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        while (reflectionGen1.CreateReflection(out reflection1))
        {
            reflectionPerm1 = new ReflectionPermission(reflection1);
            Console.WriteLine("**********************************************************\n");
            reflectionGen2.ResetIndex();

            while (reflectionGen2.CreateReflection(out reflection2))
            {
                reflectionPerm2 = new ReflectionPermission(reflection2);
                reflectionPerm3 = (ReflectionPermission)reflectionPerm1.Union(reflectionPerm2);
                reflectionPerm3 = reflectionPerm1.Union(reflectionPerm2);

                if (reflectionPerm3 == null)
                {
                    Console.WriteLine("The union of " + reflection1 + " and " + reflection2 + " is null.");
                }
                else
                {
                    Console.WriteLine("The union of " + reflectionPerm1.Flags + " and " +
                        reflectionPerm2.Flags + " = " +
                        ((ReflectionPermission)reflectionPerm3).Flags.ToString());
                }

            }
        }

        return returnValue;

    }
    // Intersect creates and returns a new permission that is the intersection of the current
    // permission and the permission specified.
    private bool IntersectDemo()
    {
        bool returnValue = true;
        ReflectionPermissionFlag reflection1, reflection2;
        ReflectionPermission reflectionPerm1, reflectionPerm2, reflectionPerm3;
        ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        while (reflectionGen1.CreateReflection(out reflection1))
        {
            reflectionPerm1 = new ReflectionPermission(reflection1);
            Console.WriteLine("**********************************************************\n");
            reflectionGen2.ResetIndex();

            while (reflectionGen2.CreateReflection(out reflection2))
            {
                reflectionPerm2 = new ReflectionPermission(reflection2);

                reflectionPerm3 = (ReflectionPermission)reflectionPerm1.Intersect(reflectionPerm2);
                if (reflectionPerm3 != null)
                {
                    Console.WriteLine("The intersection of " + reflection1 + " and " + reflection2 + " = " +
                        ((ReflectionPermission)reflectionPerm3).Flags.ToString());
                }
                else
                {
                    Console.WriteLine("The intersection of " + reflection1 + " and " + reflection2 + " is null.");
                }
            }
        }

        return returnValue;
    }
    //Copy creates and returns an identical copy of the current permission.
    private bool CopyDemo()
    {

        bool returnValue = true;

        ReflectionPermissionFlag reflection1;
        ReflectionPermission reflectionPerm1, reflectionPerm2;

        ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 = new ReflectionGenerator();

        reflectionGen1.ResetIndex();
        while (reflectionGen1.CreateReflection(out reflection1))
        {
            reflectionPerm1 = new ReflectionPermission(reflection1);
            reflectionGen2.ResetIndex();
            Console.WriteLine("********************************************************\n");
            try
            {
                reflectionPerm2 = (ReflectionPermission)reflectionPerm1.Copy();
                Console.WriteLine("Result of copy = " + reflectionPerm2.ToString());

            }
            catch (Exception e)
            {
                Console.WriteLine("Copy failed :" + reflectionPerm1.ToString() + e);
                continue;
            }
        }
        return returnValue;
    }
    // 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 bool ToFromXmlDemo()
    {

        bool returnValue = true;

        ReflectionPermissionFlag reflection1;
        ReflectionPermission reflectionPerm1, reflectionPerm2;
        ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        while (reflectionGen1.CreateReflection(out reflection1))
        {
            reflectionPerm1 = new ReflectionPermission(reflection1);
            Console.WriteLine("********************************************************\n");
            reflectionGen2.ResetIndex();
            try
            {
                reflectionPerm2 = new ReflectionPermission(PermissionState.None);
                reflectionPerm2.FromXml(reflectionPerm1.ToXml());
                Console.WriteLine("Result of ToFromXml = " +
                    reflectionPerm2.ToString());

            }
            catch (Exception e)
            {
                Console.WriteLine("ToFromXml failed :" + reflectionPerm1.ToString() + e);
                continue;
            }
        }

        return returnValue;

    }
    // Invoke all demos.
    public bool runDemo()
    {
        bool returnCode = true;
        bool tempReturnCode;

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

        // Call the Union demo.
        if (tempReturnCode = UnionDemo()) Console.Out.WriteLine("Union demo completed successfully.");
        else Console.Out.WriteLine("Union demo failed.");
        returnCode = tempReturnCode && returnCode;

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


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

        // Call the ToFromXml demo.
        if (tempReturnCode = ToFromXmlDemo()) Console.Out.WriteLine("ToFromXml demo completed successfully.");
        else Console.Out.WriteLine("ToFromXml demo failed.");
        returnCode = tempReturnCode && returnCode;

        return (returnCode);
    }
    // Test harness.
    public static void Main(String[] args)
    {
        try
        {
            ReflectionPermissionDemo democase = new ReflectionPermissionDemo();
            bool returnCode = democase.runDemo();
            if (returnCode)
            {
                Console.Out.WriteLine("ReflectionPermission demo completed successfully.");
                Console.Out.WriteLine("Press the Enter key to exit.");
                string consoleInput = Console.ReadLine();
                System.Environment.ExitCode = 100;
            }
            else
            {
                Console.Out.WriteLine("ReflectionPermission demo failed.");
                Console.Out.WriteLine("Press the Enter key to exit.");
                string consoleInput = Console.ReadLine();
                System.Environment.ExitCode = 101;
            }
        }
        catch (Exception e)
        {
            Console.Out.WriteLine("ReflectionPermission demo failed.");
            Console.WriteLine(e.ToString());
            Console.Out.WriteLine("Press the Enter key to exit.");
            string consoleInput = Console.ReadLine();
            System.Environment.ExitCode = 101;
        }
    }
}


// This class generates ReflectionPermission objects.

internal class ReflectionGenerator
{


    private ReflectionPermissionFlag[] myReflection =
{
    ReflectionPermissionFlag.AllFlags,
    ReflectionPermissionFlag.MemberAccess,
    ReflectionPermissionFlag.NoFlags,
    ReflectionPermissionFlag.ReflectionEmit,
    ReflectionPermissionFlag.TypeInformation};

    private int reflectionIndex = 0;

    public ReflectionGenerator()
    {
        ResetIndex();
    }

    public void ResetIndex()
    {
        reflectionIndex = 0;
    }
    // CreateReflection creates a ReflectionPermission object.
    public bool CreateReflection(out ReflectionPermissionFlag reflection)
    {

        if (reflectionIndex >= myReflection.Length)
        {

            reflection = ReflectionPermissionFlag.NoFlags;
            reflectionIndex++;
            return false;
        }
        reflection = myReflection[reflectionIndex++];
        return true;
    }
}

import System.*;
import System.Security.*;
import System.Security.Permissions.*;

/** @assembly CLSCompliant(true)
 */

public class ReflectionPermissionDemo
{
    // IsSubsetOf determines whether the current permission is a 
    // subset of the specified permission.
    private boolean IsSubsetOfDemo() 
    {
        boolean returnValue = true;
        ReflectionPermissionFlag reflection1[] = 
            new ReflectionPermissionFlag[1] ;
        ReflectionPermissionFlag reflection2[] = 
            new ReflectionPermissionFlag[1] ;
        ReflectionPermission reflectionPerm1[] = 
            new ReflectionPermission[1] ;
        ReflectionPermission reflectionPerm2[] = 
            new ReflectionPermission[1];
        ReflectionGenerator reflectionGen1 =  
            new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 =  
            new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
            if (reflectionPerm1[0] == null) {
                continue ;
            }
            reflectionGen2.ResetIndex();
            Console.WriteLine("***************************************" 
                + "*****************\n");
            
            while(reflectionGen2.CreateReflection(
                reflectionPerm2, reflection2)) {
                if (reflectionPerm2[0] == null) {
                    continue ;
                }
                try {
                    if ( reflectionPerm1[0].IsSubsetOf(reflectionPerm2[0])) {
                        Console.WriteLine((reflectionPerm1[0].get_Flags() 
                            + " is a subset of " + 
                        reflectionPerm2[0].get_Flags()));
                    }
                    else {
                        Console.WriteLine((reflectionPerm1[0].get_Flags() 
                            + " is not a subset of " 
                            + reflectionPerm2[0].get_Flags()));
                    }
                }
                catch(System.Exception e) {
                    Console.WriteLine(("An exception was " 
                        + "thrown for subset :" + reflectionPerm1[0] + "\n" 
                        + reflectionPerm2[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;
        ReflectionPermissionFlag reflection1[] = 
            new ReflectionPermissionFlag[1];
        ReflectionPermissionFlag reflection2[] = 
            new ReflectionPermissionFlag[1];
        ReflectionPermission reflectionPerm1[] = 
            new ReflectionPermission[1];
        ReflectionPermission reflectionPerm2[] = 
            new ReflectionPermission[1];
        IPermission reflectionPerm3;
        ReflectionGenerator reflectionGen1 =  
            new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 =  
            new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
            if (reflectionPerm1[0] == null) {
                continue ;
            }
            Console.WriteLine("*******************************************" 
                + "***************\n");
            reflectionGen2.ResetIndex();
            
            while(reflectionGen2.CreateReflection(reflectionPerm2, 
                reflection2)) {
                if (reflectionPerm2[0] == null) {
                    continue ;
                }
                reflectionPerm3 =((ReflectionPermission)(
                reflectionPerm1[0].Union(reflectionPerm2[0])));
                reflectionPerm3 = reflectionPerm1[0].Union(reflectionPerm2[0]);
                
                if (reflectionPerm3 == null) {
                    Console.WriteLine(("The union of " + reflection1[0] 
                    + " and " + reflection2[0] + " is null."));
                }
                else {
                    Console.WriteLine(("The union of " 
                    + reflectionPerm1[0].get_Flags() + " and " 
                    + reflectionPerm2[0].get_Flags() + " = " 
                    + ((ReflectionPermission)(reflectionPerm3)).
                    get_Flags().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;
        ReflectionPermissionFlag reflection1[] = 
            new ReflectionPermissionFlag[1];
        ReflectionPermissionFlag reflection2[] = 
            new ReflectionPermissionFlag[1];
        ReflectionPermission reflectionPerm1[] = 
            new ReflectionPermission[1];
        ReflectionPermission reflectionPerm2[] = 
            new ReflectionPermission[1];
        ReflectionPermission reflectionPerm3;
        ReflectionGenerator reflectionGen1 =  
            new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 =  
            new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
            if (reflectionPerm1[0] == null) {
                continue ;
            }
            Console.WriteLine("***************************************" 
                + "*******************\n");
            reflectionGen2.ResetIndex();
            
            while(reflectionGen2.CreateReflection(reflectionPerm2, 
                reflection2)) {
                if (reflectionPerm2[0] == null) {
                    continue ;
                }
                
                reflectionPerm3 =((ReflectionPermission)(
                    reflectionPerm1[0].Intersect(reflectionPerm2[0])));
                if (reflectionPerm3  != null) {
                    Console.WriteLine(("The intersection of " 
                        + reflection1[0] + " and " 
                        + reflection2[0] + " = " 
                        + ((ReflectionPermission)(reflectionPerm3)).
                        get_Flags().ToString()));
                }
                else {
                    Console.WriteLine(("The intersection of " 
                        + reflection1[0] + " and " + reflection2[0] 
                        + " is null."));
                }
            }
        }
        return returnValue ;
    } //IntersectDemo   
        
    //Copy creates and returns an identical copy of the current permission.
    private boolean CopyDemo() 
    {
        boolean returnValue = true;
        ReflectionPermissionFlag reflection1[] = 
            new ReflectionPermissionFlag[1];
        ReflectionPermission reflectionPerm1[] = 
            new ReflectionPermission[1];
        ReflectionPermission reflectionPerm2[] = 
            new ReflectionPermission[1];
        ReflectionGenerator reflectionGen1 =  
            new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 =  
            new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        
        while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
            if (reflectionPerm1[0] == null) {
                continue ;
            }
            reflectionGen2.ResetIndex();
            Console.WriteLine("*********************************" 
                + "***********************\n");
            try {
            reflectionPerm2[0] =((ReflectionPermission)(
            reflectionPerm1[0].Copy()));
            Console.WriteLine(("Result of copy = " 
                + reflectionPerm2[0].ToString()));
            } 
            catch(System.Exception  e){
                Console.WriteLine(("Copy failed :" 
                    + reflectionPerm1[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;
        ReflectionPermissionFlag reflection1[] = 
            new ReflectionPermissionFlag[1];
        ReflectionPermission reflectionPerm1[] = 
            new ReflectionPermission[1];
        ReflectionPermission reflectionPerm2[] = 
            new ReflectionPermission[1];
        ReflectionGenerator reflectionGen1 =  
            new ReflectionGenerator();
        ReflectionGenerator reflectionGen2 =  
            new ReflectionGenerator();
        reflectionGen1.ResetIndex();
        while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
            if (reflectionPerm1[0] == null) {
                continue ;
            }
            Console.WriteLine("**************************************" 
                + "******************\n");
            reflectionGen2.ResetIndex();
            try {
                reflectionPerm2[0] = 
                    new ReflectionPermission(PermissionState.None);
                reflectionPerm2[0].FromXml(reflectionPerm1[0].ToXml());
                Console.WriteLine(("Result of ToFromXml = " 
                    + reflectionPerm2[0].ToString()));
            }
            catch(System.Exception e) {
                Console.WriteLine(("ToFromXml failed :" 
                    + reflectionPerm1[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 {
            ReflectionPermissionDemo democase =  
                new ReflectionPermissionDemo();
            boolean returnCode = democase.runDemo();
            if (returnCode) {
                Console.get_Out().WriteLine("ReflectionPermission " 
                    + "demo completed successfully.");
                Console.get_Out().WriteLine("Press the Enter key to exit.");
                String consoleInput = Console.ReadLine();
                System.Environment.set_ExitCode(100);
            }
            else {
                Console.get_Out().WriteLine(
                    "ReflectionPermission demo failed.");
                Console.get_Out().WriteLine("Press the Enter key to exit.");
                String consoleInput = Console.ReadLine();
                System.Environment.set_ExitCode(101);
            }
        }
        catch(System.Exception e) {
            Console.get_Out().WriteLine("ReflectionPermission demo failed.");
            Console.WriteLine(e.ToString());
            Console.get_Out().WriteLine("Press the Enter key to exit.");
            String consoleInput = Console.ReadLine();
            System.Environment.set_ExitCode(101);
        }
    } //main
} //ReflectionPermissionDemo

// This class generates ReflectionPermission objects.
class ReflectionGenerator
{
    private ReflectionPermissionFlag myReflection[] =  {
        ReflectionPermissionFlag.AllFlags, 
        ReflectionPermissionFlag.MemberAccess, 
        ReflectionPermissionFlag.NoFlags, 
        ReflectionPermissionFlag.ReflectionEmit, 
        ReflectionPermissionFlag.TypeInformation};   
    
    private int reflectionIndex = 0;

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

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

    // CreateReflection creates a ReflectionPermission object.
    public boolean CreateReflection(ReflectionPermission reflectionPerm[],
        ReflectionPermissionFlag reflection[]) 
    {
        if (reflectionIndex >= myReflection.length) {
            reflectionPerm[0] = new ReflectionPermission(PermissionState.None);

            reflection[0] = ReflectionPermissionFlag.NoFlags;
            reflectionIndex++;
            return false ;
        }
        reflection[0] = myReflection[reflectionIndex ++];
        try {
            reflectionPerm[0] = new ReflectionPermission(reflection[0]);
            return true ;
        }
        catch(System.Exception  e){
            Console.WriteLine(("Cannot create ReflectionPermission: " 
                + reflection[0] + " " + e));
            reflectionPerm[0] = new ReflectionPermission(PermissionState.None);
            reflection[0] = ReflectionPermissionFlag.NoFlags;
            return true ;
        }
    } //CreateReflection
} //ReflectionGenerator

System.Object
   System.Security.CodeAccessPermission
    System.Security.Permissions.ReflectionPermission
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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