Modify IIS Express-ApplicationPool using C#?

public ArrayList GetApplicationPoolCollection()
{
    // Use an ArrayList to transfer objects to the client.
    ArrayList arrayOfApplicationBags = new ArrayList();

    ServerManager serverManager = new ServerManager();
    ApplicationPoolCollection applicationPoolCollection = serverManager.ApplicationPools;
    foreach (ApplicationPool applicationPool in applicationPoolCollection)
    {
        PropertyBag applicationPoolBag = new PropertyBag();
        applicationPoolBag[ServerManagerDemoGlobals.ApplicationPoolArray] = applicationPool;
        arrayOfApplicationBags.Add(applicationPoolBag);
        // If the applicationPool is stopped, restart it.
        if (applicationPool.State == ObjectState.Stopped)
        {
            applicationPool.Start();
        }
        // Set the CPU limit to a maximum of 25.
        if (applicationPool.Cpu.Limit > 25)
        {
            applicationPool.Cpu.Limit = 25;
        }
        // Set the process model max process to 1 to prohibit Web Garden
        if (applicationPool.ProcessModel.MaxProcesses > 1)
        {
            applicationPool.ProcessModel.MaxProcesses = 1;
        }
        // Set the recycling time to a maximum of one day (1440 minutes).
        if (applicationPool.Recycling.PeriodicRestart.Time.TotalMinutes > 1440)
        {
            applicationPool.Recycling.PeriodicRestart.Time = TimeSpan.FromMinutes(1440);
        }
    }

    // CommitChanges to persist the changes to the ApplicationHost.config.
    serverManager.CommitChanges();
    return arrayOfApplicationBags;
}