.NET Framework Standard Library Annotated Reference, Volume 1: Base Class Library and Extended Numerics Library

Example

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

namespace Samples
{
  public class PermissionStateSample
  {
    public static void Main()
    {
      PermissionSet ps1 =
       new PermissionSet(PermissionState.None);
      EnvironmentPermission ep =
             new EnvironmentPermission(
                     EnvironmentPermissionAccess.Read,
                     "USERNAME");
      ps1.AddPermission(ep);
      PermissionSet ps2 =
             new PermissionSet(PermissionState.Unrestricted);
      PermissionSet ps = ps1.Union(ps2);
      Console.WriteLine(
                "ps1.IsUnrestricted(): {0}",
                ps1.IsUnrestricted());
      Console.WriteLine(
                "ps2.IsUnrestricted(): {0}",
                ps2.IsUnrestricted());
      Console.WriteLine(
                "ps.IsUnrestricted(): {0}",
                ps.IsUnrestricted());
    }
  }
}

The output is

 ps1.IsUnrestricted(): False ps2.IsUnrestricted(): True ps.IsUnrestricted(): ...