C#IIS网站应用程序池列表添加修改删除

//添加应用程序池空间引用
using System.DirectoryServices;
using System.Text;
using System.Text.RegularExpressions;
using System.Diagnostics;
using System.Management;

private void button2_Click(object sender, System.EventArgs e)
  {
   this.richTextBox1.Text="";
   DirectoryEntry appPool = new DirectoryEntry("IIS://localhost/W3SVC/AppPools");
　　　  foreach(DirectoryEntry a in appPool.Children)
　　　  {　　　　
   this.richTextBox1.AppendText(a.Name+"/r");
　　　  }
  }

  private void button3_Click(object sender, System.EventArgs e)
  {
   string AppPoolName=this.textBox1.Text.Trim();
   bool ExistAppPoolFlag=false;

   try
   {
    DirectoryEntry newpool;
　　　   DirectoryEntry apppools=new DirectoryEntry("IIS://localhost/W3SVC/AppPools");
    foreach(DirectoryEntry a in apppools.Children)
　　　   {　　　　
     if(a.Name==AppPoolName)
     {
      ExistAppPoolFlag=true;
     }
　　　   }
    if(ExistAppPoolFlag==false)
    {
     newpool=apppools.Children.Add(AppPoolName, "IIsApplicationPool");　　　
     newpool.CommitChanges();
     MessageBox.Show("应用程序池添加成功","添加成功");
    }
    else
    {
     MessageBox.Show("应用程序池已经存在","添加失败");
    }
   }
   catch(Exception ex)
   {
    MessageBox.Show(ex.Message,"错误");
   }
　　　
  }

  private void button4_Click(object sender, System.EventArgs e)
  {
   string oldAppPoolName=this.textBox1.Text.Trim();
   string newAppPoolName=this.textBox2.Text.Trim();
   bool ExistAppPoolFlag=false;

   try
   {
　　　   DirectoryEntry apppools=new DirectoryEntry("IIS://localhost/W3SVC/AppPools");
    foreach(DirectoryEntry a in apppools.Children)
　　　   {　　　　
     if(a.Name==oldAppPoolName)
     {
      ExistAppPoolFlag=true;
      a.Rename(newAppPoolName);
      a.CommitChanges();
      MessageBox.Show("应用程序池名称修改成功","修改成功");
     }
　　　   }
    if(ExistAppPoolFlag==false)
    {
     MessageBox.Show("应用程序池未找到","修改失败");
    }
   }
   catch(Exception ex)
   {
    MessageBox.Show(ex.Message,"错误");
   }
  }


  private void button5_Click(object sender, System.EventArgs e)
  {
   string AppPoolName=this.textBox1.Text.Trim();
   bool ExistAppPoolFlag=false;

   try
   {
　　　   DirectoryEntry apppools=new DirectoryEntry("IIS://localhost/W3SVC/AppPools");
    foreach(DirectoryEntry a in apppools.Children)
　　　   {　　　　
     if(a.Name==AppPoolName)
     {
      ExistAppPoolFlag=true;
      a.DeleteTree();
      MessageBox.Show("应用程序池名称删除成功","删除成功");
     }
　　　   }
    if(ExistAppPoolFlag==false)
    {
     MessageBox.Show("应用程序池未找到","删除失败");
    }
   }
   catch(Exception ex)
   {
    MessageBox.Show(ex.Message,"错误");
   }

  }