HiraokaHyperTools.LibEditLGPO

This will provide Simple wrapper of IGroupPolicyObject: IGroupPolicyObject (gpedit.h) - Win32 apps | Microsoft Learn

Inspired by https://stackoverflow.com/a/22673417 (which is inspired by https://bitbucket.org/MartinEden/local-policy)

Links: Doxygen

Listing usage

Note: This must run on STA thread apartment!

var viewComputerConfiguration = true;
using (var gpo = new ComputerGroupPolicyObject(new GroupPolicyObjectSettings(loadRegistryInfo: true, readOnly: true)))
using (var registryKey = gpo.GetRootRegistryKey(viewComputerConfiguration ? GroupPolicySection.Machine : GroupPolicySection.User))
{
    void Walk(RegistryKey key)
    {
        foreach (var subKeyName in key.GetSubKeyNames())
        {
            using (var subKey = key.OpenSubKey(subKeyName))
            {
                Walk(subKey);
            }
        }
        foreach (var valueName in key.GetValueNames())
        {
            var kind = key.GetValueKind(valueName);
            var data = key.GetValue(valueName, "", RegistryValueOptions.DoNotExpandEnvironmentNames);
            Console.WriteLine($"{key.Name.TrimStart('\\')}\\{valueName} = {data}");
        }
    }
 
    Walk(registryKey);
}

Output:

SOFTWARE\Policies\Microsoft\Windows\Windows Error Reporting\DontShowUI = 0

Modification usage

Note: This must run on STA thread apartment! Note: This must run on Administrator privileges!

var modifyComputerConfiguration = true;
using (var gpo = new ComputerGroupPolicyObject(new GroupPolicyObjectSettings(loadRegistryInfo: true, readOnly: false)))
using (var registryKey = gpo.GetRootRegistryKey(modifyComputerConfiguration ? GroupPolicySection.Machine : GroupPolicySection.User))
{
    RegistryKeyHelper.SetPolicySetting(
        registryKey,
        @"SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU",
        @"AlwaysAutoRebootAtScheduledTime",
        1,
        RegistryValueKind.DWord
    );
    RegistryKeyHelper.SetPolicySetting(
        registryKey,
        @"SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU",
        @"AlwaysAutoRebootAtScheduledTimeMinutes",
        15,
        RegistryValueKind.DWord
    );
 
    gpo.Save();
}

Run on STA thread apartment

Main:

[STAThread()]
static int Main(string[] args)
{
  // ...
}

new Thread:

var t = new Thread(() =>
{
  // ...
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
t.Join();

NUnit:

[Test]
[Apartment(ApartmentState.STA)]
public void ListUsage()
{
  // ...
}