private static ACR122U acr122u = new ACR122U( );

static void Main(string[ ] args)
{ 
    acr122u.Init(false, 50, 4, 4, 200);  // NTAG213
    acr122u.CardInserted += Acr122u_CardInserted;
    acr122u.CardRemoved += Acr122u_CardRemoved;
    Console.ReadLine( );
}

private static void Acr122u_CardInserted(PCSC.ICardReader reader)
{ 
    Console.WriteLine("NFC tag placed on reader.");
    Console.WriteLine("Unique ID: " + BitConverter.ToString(acr122u.GetUID(reader)).Replace("-", ""));
    string data = "Hello World";
    Console.WriteLine("Write data to NFC tag: " + data);
    bool ret = acr122u.WriteData(reader, Encoding.UTF8.GetBytes(data));
    Console.WriteLine("Write result: " + (ret ? "Success" : "Failed"));
    Console.WriteLine("Read data from tag: " + Encoding.UTF8.GetString(acr122u.ReadData(reader)));
}

private static void Acr122u_CardRemoved()
{
    Console.WriteLine("NFC tag removed.");
}