用C#编写获取远程IP,MAC的方法

[DllImport("Iphlpapi.dll")]   private static unsafe extern int SendARP(Int32 dest,Int32 host,ref IntPtr mac,ref IntPtr length);   [DllImport("Ws2_32.dll")]   private static extern Int32 inet_addr(string ip);     Int32 ldest= inet_addr("157.60.68.163");//目的地的ip   Int32 lhost= inet_addr("157.60.68.33");//本地的ip     try   {   Byte[] macinfo=new Byte[6];   Int32 length=6;     IntPtr mac=new IntPtr(macinfo[0]);   IntPtr len=new IntPtr(6);   int ii=SendARP(ldest,lhost, ref mac, ref len);     Console.WriteLine("Mac Add:"+mac);   Console.WriteLine("length:"+len);       }   catch(Exception err)   {   Console.WriteLine(err);   }