What do you need to open an auction?

Question

C++ / C#

What do you need to open an auction?
Good day! Can anyone tell me what is needed in order to open an online auction? Are any licenses required? where is the best place to register a domain?
In general, if anyone knows anything about this, please unsubscribe if it's not difficult!
1. Do I need a license
2. Do I need to pay taxes
3. In what zone can and can not register a domain
Thanks in advance for your answers!

Answer 1

If you need to check if your program is launched only once on a PC, then it is better to use this approach:

public static void Main ()
  {
      bool IsExist;
      using ( new Semaphore ( 0, 1, "MyAppUniqueString", out IsExist ) ) 
    {
        if ( IsExist )
      { /* Этот поток создает ядро, другие копии программы не смогут запуститься. */ }
        else
      { /* Этот поток открывает существующее ядро с тем же именем.
              Ничего не делаем, ждем возвращения управления от метода Main, чтобы завершить вторую копию приложения. */  }
}}

Answer 2

It takes a lot. The main thing is that you need a Brand / Image / Trust from the participants. Until there is trust, it is difficult to attract participants....

Answer 3

2. Do I need to pay taxes
yes. state or "roof"))

Answer 4

1) Depends on the country where the legal / natural person is registered.
2) Similar to the first, but in 99% - it is necessary.
3) In all it is possible, if it is legal.