原理：通过ARP命令查询，然后返回数据，根据返回数据进行分割保存

最后使用LINQ查询。

/// <summary>          /// 获取ARP查询字符串          /// </summary>          /// <returns></returns>          private static string GetARPResult()          {              Process p = null;              string output = string.Empty;              try              {                  p = Process.Start(new ProcessStartInfo("arp", "-a")                  {                      CreateNoWindow = true,                      UseShellExecute = false,                      RedirectStandardOutput = true                  });                  output = p.StandardOutput.ReadToEnd();              }              catch (Exception ex)              {                  throw new Exception("IPInfo: Error Retrieving 'arp -a' Results", ex);              }              finally              {                  if (p != null)                  {                      p.Close();                  }              }              return output;          }

转换为对应的列表：

/// <summary>          /// 获取IP地址与Mac地址对应数据表          /// </summary>          /// <returns>Mac-IP</returns>          public static List<string[]> GetIPInfo()          {              try              {                  var list = new List<string[]>();                  foreach (var arp in FLYFI_SHARE_CONNECTION.GetARPResult().Split(new char[] { '\n', '\r' }))                  {                      if (!string.IsNullOrEmpty(arp))                      {                          var pieces = (from piece in arp.Split(new char[] { ' ', '\t' })                                        where !string.IsNullOrEmpty(piece)                                        select piece).ToArray();                          if (pieces.Length == 3)                          {                              //pieces[1]Mac                              //pieces[0]IP                              list.Add(new string[2] { pieces[1], pieces[0] });                          }                      }                  }                  return list;              }              catch (Exception ex)              {                  throw new Exception("IPInfo: Error Parsing 'arp -a' results", ex);              }          }

查询：

/// <summary>          /// Mac地址转换为IP地址          /// </summary>          /// <param name="str">IP</param>          /// <returns></returns>          public static string GetIpFromMac(string str)          {              str = str.Trim().ToString().Replace(":", "-");              var ipinfo = (from ip in FLYFI_SHARE_CONNECTION.GetIPInfo()                            where ip[0].ToLowerInvariant() == str.ToLowerInvariant()                            select ip[1]).FirstOrDefault();              return ipinfo;          }