using (DirectoryEntry appPools = new DirectoryEntry("IIS://localhost/W3SVC/AppPools"))
                {
                    foreach (DirectoryEntry appPool in appPools.Children)
                    {
                        if (appPool.Name.Equals(poolName))
                        {
                            foreach (string p in appPool.Properties.PropertyNames)
                            {
                                textBox1.Text += String.Format("{0} = {1}，",
                                    p,
                                    appPool.Properties[p].Value.ToString());
                            }
                        }
                    }
                }