Unity网络通讯（一）获取计算机的MAC地址

 1　　 string GetMac()
  　 {
         string mac = "";
         mac = GetMacAddressBySendARP();
         return mac;
     }
     [DllImport("Iphlpapi.dll")]
     static extern int SendARP(Int32 DestIP, Int32 SrcIP, ref Int64 MacAddr, ref Int32 PhyAddrLen);
     /// <summary>
     /// SendArp获取MAC地址
     /// </summary>
     /// <returns></returns>
     public string GetMacAddressBySendARP()
     {
         StringBuilder strReturn = new StringBuilder();
         try
         {
             System.Net.IPHostEntry Tempaddr = (System.Net.IPHostEntry)Dns.GetHostByName(Dns.GetHostName());
             System.Net.IPAddress[] TempAd = Tempaddr.AddressList;
             Int32 remote = (int)TempAd[].Address;
             Int64 macinfo = new Int64();
             Int32 length = ;
             SendARP(remote, , ref macinfo, ref length);
             string temp = System.Convert.ToString(macinfo, ).PadLeft(, '').ToUpper();
             int x = ;
             for (int i = ; i < ; i++)
             {
                 if (i == ) { strReturn.Append(temp.Substring(x - , )); }
                 else { strReturn.Append(temp.Substring(x - , ) + ":"); }
                 x -= ;
             }
             return strReturn.ToString();
         }
         catch
         {
             return "";
         }
     }  

以上代码可直接调用GetMac()函数获取电脑的Mac地址