public static void ShowNetworkInterfaces()
{
    IPGlobalProperties computerProperties = IPGlobalProperties.GetIPGlobalProperties();
    NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
    Console.WriteLine("Interface information for {0}.{1}     ",
            computerProperties.HostName, computerProperties.DomainName);
    if (nics == null || nics.Length < 1)
    {
        Console.WriteLine("  No network interfaces found.");
        return;
    }

    Console.WriteLine("  Number of interfaces .................... : {0}", nics.Length);
    foreach (NetworkInterface adapter in nics)
    {
        IPInterfaceProperties properties = adapter.GetIPProperties(); //  .GetIPInterfaceProperties();
        Console.WriteLine();
        Console.WriteLine(adapter.Description);
        Console.WriteLine(String.Empty.PadLeft(adapter.Description.Length,'='));
        Console.WriteLine("  Interface type .......................... : {0}", adapter.NetworkInterfaceType);
        Console.Write("  Physical address ........................ : ");
        PhysicalAddress address = adapter.GetPhysicalAddress();
        byte[] bytes = address.GetAddressBytes();
        for(int i = 0; i< bytes.Length; i++)
        {
            // Display the physical address in hexadecimal.
            Console.Write("{0}", bytes[i].ToString("X2"));
            // Insert a hyphen after each byte, unless we are at the end of the 
            // address.
            if (i != bytes.Length -1)
            {
                 Console.Write("-");
            }
        }
        Console.WriteLine();
    }
}

void ShowNetworkInterfaces()
{
   IPGlobalProperties^ computerProperties = IPGlobalProperties::GetIPGlobalProperties();
   array<NetworkInterface^>^nics = NetworkInterface::GetAllNetworkInterfaces();
   Console::WriteLine( L"Interface information for {0}.{1}     ", computerProperties->HostName, computerProperties->DomainName );
   if ( nics == nullptr || nics->Length < 1 )
   {
      Console::WriteLine( L"  No network interfaces found." );
      return;
   }

   Console::WriteLine( L"  Number of interfaces .................... : {0}", (nics->Length).ToString() );
   IEnumerator^ myEnum1 = nics->GetEnumerator();
   while ( myEnum1->MoveNext() )
   {
      NetworkInterface^ adapter = safe_cast<NetworkInterface^>(myEnum1->Current);
      IPInterfaceProperties^ properties = adapter->GetIPProperties();
      Console::WriteLine();
      Console::WriteLine( adapter->Description );
      Console::WriteLine( String::Empty->PadLeft( adapter->Description->Length, '=' ) );
      Console::WriteLine( L"  Interface type .......................... : {0}", adapter->NetworkInterfaceType );
      Console::Write( L"  Physical address ........................ : " );
      PhysicalAddress^ address = adapter->GetPhysicalAddress();
      array<Byte>^bytes = address->GetAddressBytes();
      for ( int i = 0; i < bytes->Length; i++ )
      {

         // Display the physical address in hexadecimal.
         Console::Write( L"{0}", bytes[ i ].ToString( L"X2" ) );

         // Insert a hyphen after each byte, unless we are at the end of the 
         // address.
         if ( i != bytes->Length - 1 )
         {
            Console::Write( L"-" );
         }

      }
      Console::WriteLine();
   }
}

public static void ShowNetworkInterfaces()
{
    IPGlobalProperties computerProperties 
        = IPGlobalProperties.GetIPGlobalProperties();
    NetworkInterface nics[] = NetworkInterface.GetAllNetworkInterfaces();
    Console.WriteLine("Interface information for {0}.{1}     ", 
        computerProperties.get_HostName(), 
        computerProperties.get_DomainName());
    if (nics == null || nics.get_Length() < 1) {
        Console.WriteLine("  No network interfaces found.");
        return;
    }

    Console.WriteLine("  Number of interfaces .................... : {0}", 
        System.Convert.ToString(nics.get_Length()));
    for (int iCtr1 = 0; iCtr1 < nics.get_Length(); iCtr1++) {
        NetworkInterface adapter = (NetworkInterface)nics.get_Item(iCtr1);
        IPInterfaceProperties properties 
            = adapter.GetIPProperties();
        Console.WriteLine();
        Console.WriteLine(adapter.get_Description());
        Console.WriteLine(String.Empty.PadLeft(adapter.get_Description().
            get_Length(), '='));
        Console.WriteLine("  Interface type .......................... : {0}",
            adapter.get_NetworkInterfaceType());
        Console.Write("  Physical address ........................ : ");
        PhysicalAddress address = adapter.GetPhysicalAddress();
        ubyte bytes[] = address.GetAddressBytes();
        for (int i = 0; i < bytes.get_Length(); i++) {
            // Display the physical address in hexadecimal.
            Console.Write("{0}", ((Int32)bytes.get_Item(i)).ToString("X2"));
            // Insert a hyphen after each byte, unless we are at the end 
            // of the address.
            if (i != bytes.get_Length() - 1) {
                Console.Write("-");
            }
        }
        Console.WriteLine();
    }
} //ShowNetworkInterfaces