public class AuthPacket
{
    [Packet("HC")]
    public void test_1(string packet)
    {
        // GET the KEY
    }

    [Packet("AK")]
    public void test_2(string packet)
    {
        // EXECUTE THE CODE
    }
}

public class ChatPacket
{
    [Packet("BM")]
    public void test_1(string packet)
    {
        // SEND MESSAGE IN NORMAL CANAL
    }

    [Packet("BMG")]
    public void test_2(string packet)
    {
        // SEND MESSAGE IN GUILD CANAL
    }
}