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[0].Address;
            Int64 macinfo = new Int64();
            Int32 length = 6;
            SendARP(remote, 0, ref macinfo, ref length);
            string temp = System.Convert.ToString(macinfo, 16).PadLeft(12, '0').ToUpper();
            int x = 12;
            for (int i = 0; i < 6; i++)
            {
                if (i == 5) { strReturn.Append(temp.Substring(x - 2, 2)); }
                else { strReturn.Append(temp.Substring(x - 2, 2) + ":"); }
                x -= 2;
            }
            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