ch8_11.cs

《c#技术内幕代码》

using System;
using System.Security.Permissions;

class ch8_11
{
   public static void Main()
   {
        // Check for permissionto read the registry key
        RegistryPermission f = new RegistryPermission(
            RegistryPermissionAccess.Read, 
              "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0"
         );   
	
        if ( f.IsUnrestricted() )
	   Console.WriteLine("Unrestricted Access allowed");
	else
	   Console.WriteLine("Unrestricted Access DENIED");
	
        // Check for local file access   
        FileIOPermission fileIO = new FileIOPermission(PermissionState.None);
	Console.WriteLine("All Local files read access: {0}", FileIOPermissionAccess.Read);
	Console.WriteLine("All Local files write access: {0}", FileIOPermissionAccess.Write);
	
        // How about clipboard/window access?
	UIPermission ui = new UIPermission(UIPermissionWindow.AllWindows,
	    UIPermissionClipboard.AllClipboard );
	if ( ui.IsUnrestricted() )
	   Console.WriteLine("UI Unrestricted Access allowed");
	else
	   Console.WriteLine("UI Unrestricted Access DENIED");
	
   }
}