i need MAC Address of client machine using asp.net

GetMacAdress method without using System.Management

private string GetMAC()
        {
            string macAddresses = "";

            foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
            {
                if (nic.OperationalStatus == OperationalStatus.Up)
                {
                    macAddresses += nic.GetPhysicalAddress().ToString();
                    break;
                }
            }
            return macAddresses;
        }

protected void Page_Load(object sender, EventArgs e)
       {
          string macid= GetMacAddress("pass IP Address of the mechine");
       }
       [DllImport("iphlpapi.dll", ExactSpelling = true)]
       public static extern int SendARP(int DestIP, int SrcIP, [Out] byte[] pMacAddr, ref int PhyAddrLen);
       public string GetMacAddress(string sName)
       {
           string s = string.Empty;
           System.Net.IPHostEntry Tempaddr = null;
           Tempaddr = (System.Net.IPHostEntry)Dns.GetHostEntry(sName);
           System.Net.IPAddress[] TempAd = Tempaddr.AddressList;
           string[] Ipaddr = new string[3];
           foreach (IPAddress TempA in TempAd)
           {
               Ipaddr[1] = TempA.ToString();
               byte[] ab = new byte[6];
               int len = ab.Length;
               int r = SendARP((int)TempA.Address, 0, ab, ref len);
               string sMAC = BitConverter.ToString(ab, 0, 6);
               Ipaddr[2] = sMAC;
               s = sMAC;
           }
           return s;
       }

public string GetMACAddress()
{
ManagementObjectSearcher objMOS = new ManagementObjectSearcher("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection objMOC = objMOS.Get();
string MACAddress = String.Empty;
foreach (ManagementObject objMO in objMOC)
{
if (MACAddress == String.Empty) // only return MAC Address from first card
{
MACAddress = objMO["MacAddress"].ToString();
}
objMO.Dispose();
}
MACAddress = MACAddress.Replace(":", "");
return MACAddress;
}