directory-connector/src/Service/Installer.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading.Tasks;
using System.Configuration.Install;
using System.Diagnostics;

namespace Service
{
    [RunInstaller(true)]
    [DesignerCategory("Code")]
    public class Installer : System.Configuration.Install.Installer
    {

        private IContainer _components = null;
        private ServiceProcessInstaller _serviceProcessInstaller;
        private ServiceInstaller _serviceInstaller;

        public Installer()
        {
            Init();
        }

        private void Init()
        {
            _components = new Container();
            _serviceProcessInstaller = new ServiceProcessInstaller();
            _serviceInstaller = new ServiceInstaller();

            _serviceProcessInstaller.Account = ServiceAccount.LocalSystem;
            _serviceProcessInstaller.AfterInstall += new InstallEventHandler(AfterInstalled);
            _serviceProcessInstaller.BeforeInstall += new InstallEventHandler(BeforeInstalled);

            _serviceInstaller.ServiceName = "bitwarden Directory Connector";
            _serviceInstaller.Description = "Sync directory groups and users to your bitwarden organization.";
            Installers.AddRange(new System.Configuration.Install.Installer[] { _serviceProcessInstaller, _serviceInstaller });
        }

        private void AfterInstalled(object sender, InstallEventArgs e)
        {

        }

        private void BeforeInstalled(object sender, InstallEventArgs e)
        {
            if(EventLog.SourceExists(_serviceInstaller.ServiceName))
            {
                EventLog.DeleteEventSource(_serviceInstaller.ServiceName);
            }

            if(EventLog.Exists("bitwarden"))
            {
                EventLog.Delete("bitwarden");
            }
        }
    }
}