Get MAC Address

Before use this one include the
System.Management Reference

public string getMACAddr()
{
string MacAddress = "";
try
{
ManagementClass mc = new ManagementClass(managementclasspath);
ManagementObjectCollection moc = mc.GetInstances();
foreach (ManagementObject mo in moc)
{
if ((bool)mo[ipCheckingKey] == true)
{
// MessageBox.Show(mo["MacAddress"].ToString());
MacAddress = mo["MacAddress"].ToString();
break;
}
mo.Dispose();
}

//MacAddress = MacAddress.Replace(":", "-");
}
catch (System.Management.ManagementException Me)
{
MessageBox.Show(Me.Message);
}

return (MacAddress);
}