using System;
using System.Collections;
using System.ComponentModel;
using System.Configuration.Install;
using System.Diagnostics;
using System.IO;
using System.Runtime.Remoting.Contexts;

namespace AppStarter
{
  [RunInstaller(true)]
  public class AppStarterInstaller : Installer
  {
    public override void Commit(IDictionary savedState)
    {
      base.Commit(savedState);

      string appPath = Path.Combine(
          @"C:\Program Files (x86)\Kilian Wirl GmbH\Verwaltung",
          "Deckungsbeitrag.exe"); // Deine Haupt-App

      if (File.Exists(appPath))
      {
        Process.Start(appPath);
      }
    }
  }
}