C#获取网络邻居所有工作组和机器名称

using system;
using system.drawing;
using system.collections;
using system.componentmodel;
using system.windows.forms;
//查询网络上的计算机ip和用户需要引用
using system.data;
using system.io;
using system.net;
using system.net.sockets;
using system.threading;
//关键引用空间system.directoryservices.dll,system.management.dll
using system.directoryservices;
using system.management;

//获取网络邻居中的所有计算机ip和当前登录用户   
   string strdomain;
   string strcomputer;
   string strshare;   
   
   directoryentry root =new directoryentry("winnt:");
   foreach(directoryentry domain in root.children)
   {
   //枚举工作组或域
    strdomain=domain.name;
    combobox1.items.add(strdomain);
    foreach(directoryentry computer in domain.children)
    {
    //枚举指定工作组或域的计算机
     
      if(computer.schemaclassname.equals("computer"))
      {
       strcomputer=computer.name;
       combobox2.items.add(strcomputer);      
       
      
      //枚举指定计算机的共享文件夹 
      
       //获取本机共享的文件夹
       managementobjectsearcher searcher = new managementobjectsearcher("select * from win32_share");
        foreach (managementobject share in searcher.get())
       {
        strshare=share["name"].tostring();
        combobox3.items.add(strshare);         
       }     
      
      }    
    }  
   }