How to get Network Adapter Mac Address in C#

 

First you need to add refererense from for get the mac address of network adapter.
Add Reference -->  .NET --> System.Management.

----------------------------*****************--------------------------
To get mac address of Local system.
using System.Managemant;
public static string GetMacAddress()
            {
                string Mac = string.Empty;
                ManagementClass MC = new ManagementClass("Win32_NetworkAdapter");
                ManagementObjectCollection MOCol = MC.GetInstances();
                foreach (ManagementObject MO in MOCol)
                    if (MO != null)
                    {
                        if (MO["MacAddress"] != null)
                        {
                            Mac = MO["MACAddress"].ToString();
                            if (Mac != string.Empty)
                                break;
                        }
                    }
                return Mac;
            }

-------------------------------------------------------------------------------

To get mac address of when your system in on LAN on etharnet .

Using System.Management;

  public PhysicalAddress GetMacAddress()           //Get MAC Address of the machine.
        {
            foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
            {
                // Only consider Ethernet network interfaces
                if (nic.NetworkInterfaceType == NetworkInterfaceType.Ethernet &&
                    nic.OperationalStatus == OperationalStatus.Up)
                {
                    return nic.GetPhysicalAddress();
                }
            }
            return null;
        }