How to create event log under a folder

using System.Diagnostics;

internal class DefinitionSet {
    //define how much do you need:
    internal const int MaximumLogSizeKilobytes = 2048;
} //class DefinitionSet

public class EventLogInstallationHelper {

    public EventLogInstallationHelper(
        string applicationName, string eventLogName) {
            this.EventLogName = eventLogName;
            this.ApplicationName = applicationName;
    } //EventLogInstallationHelper

    public void Install() { //can throw exception!
        if ((!string.IsNullOrEmpty(ApplicationName)) &&
            (!string.IsNullOrEmpty(EventLogName)))
                  EventLog.CreateEventSource(
                      ApplicationName,
                      EventLogName);
        EventLog log = new EventLog(EventLogName);
        log.MaximumKilobytes = DefinitionSet.MaximumLogSizeKilobytes;
        log.ModifyOverflowPolicy(OverflowAction.OverwriteAsNeeded, 0);
    } //Install

    public void Uninstall() { //can throw exception!
        if (!string.IsNullOrEmpty(EventLogName)) {
                EventLog deletingLog = new EventLog(EventLogName);
                deletingLog.Clear();
        } //if
        if (!string.IsNullOrEmpty(ApplicationName))
                EventLog.DeleteEventSource(ApplicationName);
        result |= true;
        if (!string.IsNullOrEmpty(EventLogName))
                EventLog.Delete(EventLogName);
        result |= true;
    } //Uninstall

    string ApplicationName, EventLogName;

} //class EventLogInstallationHelper

string Application = "Event Log Test";
string EventLogName = "CodeProject";
EventLogInstallationHelper helper =
    new EventLogInstallationHelper(
        Application,
        EventLogName);

try {
    helper.Install();
} catch {
    System.Console.WriteLine("Event Log already installed");
} //exception

EventLog.WriteEntry(Application, "some log");
EventLog.WriteEntry(Application, "some warning", EventLogEntryType.Warning);
EventLog eventLog = new EventLog();
eventLog.Source = Application;
eventLog.WriteEntry("another log");
eventLog.WriteEntry("some error", EventLogEntryType.Error);

System.Console.WriteLine("See event log now, then press any key");
System.Console.ReadKey(true);

try {
    helper.Uninstall();
} catch {
    System.Console.WriteLine("Event log already uninstalled");
} //exception

- Application and Services Logs
-- Company Name
--- Application 1
---- ApplicationLog
--- Application 2
---- SecurityLog
---- OperationalLog

# Create the eventlog (in a subfolder structure)
# Params()
$PrimaryEventKey = 'Company'
$ApplicationName = 'Application'
$LogName = 'NewLog'

# Vars()
$primarylocation = 'HKLM:\Software\Microsoft\Windows\CurrentVersion\WINEVT\Channels'
$LogName = $PrimaryEventKey + '-' + $ApplicationName + '-' + $LogName
$EventRoot = (Join-Path $primarylocation $LogName)

if (!(Test-Path $EventRoot)) {
    New-Item -Path $EventRoot
    New-ItemProperty -Path $EventRoot -Name Enabled -PropertyType DWord -Value 1
    New-ItemProperty -Path $EventRoot -Name Type -PropertyType DWord -Value 1
    New-ItemProperty -Path $EventRoot -Name Isolation -PropertyType DWord -Value 0
    New-ItemProperty -Path $EventRoot -Name RestrictGuestAccess -PropertyType String -Value 1
    New-ItemProperty -Path $EventRoot -Name OwningPublisher -PropertyType String -Value "{$($GUID)}"

    # See https://docs.microsoft.com/en-us/windows/desktop/eventlog/eventlog-key for documentation on the ChannelAccess or or RestrictGuestAccess (see: RestrictGuestAccess / Isolation)
}
else {
    Write-Warning 'Event Log (Key) Already exists in registry'
}

# Write into the event log (Example)
$eventType = ([System.Diagnostics.EventLogEntryType]::Information)
$evt = New-Object System.Diagnostics.EventLog($LogName)
$evt.Source = "SomeSource"
$evt.WriteEntry("random message", $eventType, 60001)