PACKAGE

using Microsoft.Win32;
using System.Security.AccessControl;

// Open a registry key (or create it if it doesn't exist)
using RegistryKey registryKey = Registry.CurrentUser.CreateSubKey("TestKey");
if (registryKey == null)
{
    Console.WriteLine("Failed to create or open the registry key.");
    return;
}

// Get the current access control list (ACL) for the registry key
RegistrySecurity registrySecurity = registryKey.GetAccessControl();
Console.WriteLine("Current Access Control List (ACL):");
Console.WriteLine(registrySecurity.GetSecurityDescriptorSddlForm(AccessControlSections.Access));

// Create a new access rule granting full control to the current user
string currentUser = Environment.UserName;
RegistryAccessRule accessRule = new RegistryAccessRule(currentUser, RegistryRights.FullControl, InheritanceFlags.None, PropagationFlags.None, AccessControlType.Allow);

// Add the new access rule to the ACL
registrySecurity.AddAccessRule(accessRule);

// Set the updated ACL on the registry key
registryKey.SetAccessControl(registrySecurity);

// Get and display the updated ACL for the registry key using the second GetAccessControl overload
RegistrySecurity updatedRegistrySecurity = registryKey.GetAccessControl(AccessControlSections.Access);
Console.WriteLine("Updated Access Control List (ACL):");
Console.WriteLine(updatedRegistrySecurity.GetSecurityDescriptorSddlForm(AccessControlSections.Access));