public void OnCumsomUpdateReceived(ClientArgs e) => CustomUpdate?.Invoke(this, e);
private static void CommonUpdateE2(object sender, ClientArgs e) => Console.WriteLine("Second handler");
public void OnCommonUpdateReceived(ClientArgs e) => CommonUpdate.Invoke(this, e);
private static void CommonUpdateE1(object sender, ClientArgs e) => Console.WriteLine("First handler");