C# 如何得到局域网中的计算机名？

private void ScanTarget()
{
            string strIPAddress="192.168.1.";
            //Start scan address
            int nStrat = Int32.Parse("1");
            //Finish scan address
            int nEnd =Int32.Parse("255");
            //scan operation
            for(int i=nStrat;i<=nEnd;i++)
{
                string strScanIPAdd = strIPAddress +i.ToString();
                //convert to ip address
                IPAddress myScanIP = IPAddress.Parse(strScanIPAdd);
                try
{
                    //get dns information
                    IPHostEntry myScanHost = Dns.GetHostByAddress(myScanIP);
                    //get host name
                    string strHostName =myScanHost.HostName.ToString();
                    this.listBox2.Items.Add(strScanIPAdd+"->"+strHostName+"\r");
                }
                catch
{
                    continue;
                }
                
            }//for    
            MessageBox.Show("ok");
        }