/// <summary>
/// Method that incapsulates event call.
/// </summary>
/// <param name="sender">
/// Caller object.
/// </param>
/// <param name="e">
/// Event data.
/// </param>
protected virtual void OnOutput(object sender, BookServiceEventArgs e)
{
this.BookEventOutput?.Invoke(sender, e);
}
private static void DisplayOnConsole(object sender, BookServiceEventArgs e)
{
Console.WriteLine(e.Output);
}
