C# - IIS7: Neuen ApplicationPool anlegen

/// <summary>
///   Updated or creates the application pool for classic .net 4.
/// </summary>
/// <param name = "poolName">Name of the pool.</param>
public void SetPool(string poolName)
{
  using (var serverManager = new ServerManager())
  {
    var pool = serverManager.ApplicationPools.FirstOrDefault(p => p.Name == poolName) ?? serverManager.ApplicationPools.Add(poolName);
    pool.ManagedPipelineMode = ManagedPipelineMode.Classic;
    pool.AutoStart = true;
    if (Environment.Is64BitOperatingSystem)
      pool.Enable32BitAppOnWin64 = true;
    pool.ManagedRuntimeVersion = "v4.0";
    pool.ProcessModel.IdentityType = ProcessModelIdentityType.NetworkService;
    serverManager.CommitChanges();
  }
}