This documentation is archived and is not being maintained.

SecurityPolicySection Class

Defines configuration settings that are used to support the security infrastructure of a Web application. This class cannot be inherited.

Namespace:  System.Web.Configuration
Assembly:  System.Web (in System.Web.dll)

public sealed class SecurityPolicySection : ConfigurationSection

The SecurityPolicySection class provides a way to programmatically access and modify the content of the securityPolicy section of the configuration file.

This example demonstrates how to specify values declaratively within the securityPolicy section, which can also be accessed as members of the SecurityPolicySection class.

The following configuration file example shows how to specify values declaratively for the securityPolicy section.

    <trustLevel name="Full" policyFile="internal" />
    <trustLevel name="High" policyFile="web_hightrust.config" />
    <trustLevel name="Medium" policyFile="web_mediumtrust.config" />
    <trustLevel name="Low" policyFile="web_lowtrust.config" />
    <trustLevel name="Minimal" policyFile="web_minimaltrust.config" />

The following code example demonstrates how to use the SecurityPolicySection class.

#region Using directives

using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.Web;
using System.Web.Configuration;


namespace Samples.Aspnet.SystemWebConfiguration
  class UsingSecurityPolicySection
    static void Main(string[] args)
        // Set the path of the config file.
        string configPath = "";

        // Get the Web application configuration object.
        Configuration config = 

        // Get the section-related object.
        SecurityPolicySection configSection =

        // Display title and info.
        Console.WriteLine("ASP.NET Configuration Info");

        // Display Config details.
        Console.WriteLine("File Path: {0}",
        Console.WriteLine("Section Path: {0}",

        // Display the number of trust levels.
        Console.WriteLine("TrustLevels Collection Count: {0}",

        // Display elements of the TrustLevels collection property. 
        for (int i = 0; i < configSection.TrustLevels.Count; i++) 
          Console.WriteLine("TrustLevel {0}:", i);
          Console.WriteLine("Name: {0}", 
          Console.WriteLine("Type: {0}", 

        // Add a TrustLevel element to the configuration file.
        configSection.TrustLevels.Add(new TrustLevel("myTrust", "mytrust.config"));

        // Update if not locked. 
        if (!configSection.SectionInformation.IsLocked)
          Console.WriteLine("** Configuration updated.");
          Console.WriteLine("** Could not update; section is locked.");

      catch (Exception e)
        // Unknown error.

      // Display and wait

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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0