public void Execute(string[] args)
        {
            ConsoleInput consoleInput = new ConsoleInput(args, name);
            if (consoleInput.IsValidCommandName())
            {
                ActivateParameters();
                var minimumParameters = parameters.MandatoryLength();
                var maximumParameters = parameters.ParametersLength();

                if (consoleInput.Parameters.Length >= minimumParameters && consoleInput.Parameters.Length <= maximumParameters)
                {
                    var phoneBook = new PhoneBook();
                    var fileIO = new InputOutput("PhoneBook.txt");
                    fileIO.ReadFile(ref phoneBook);
                    string index = consoleInput[0];
                    if (phoneBook.ValidIndex(index))
                    {
                        KeyValuePair<string, Contact> currentItem = phoneBook.GetElementTo(index);
                        ////Console.WriteLine("{0} {1} {2}", new object[] { index, currentItem.Value.Name, currentItem.Value.PhoneNumber });
                        message = string.Format("{0} {1} {2} {3}", index, currentItem.Value.Name, currentItem.Value.PhoneNumber, currentItem.Value.BirthDate);
                    }
                    else message = string.Format("Your input '{0}' is not valid.", index);
                }
                else
                {
                    message = string.Format("This command requires 1 mandatory parameter");
                    message += System.Environment.NewLine;
                    message += string.Format("{0}", string.Join(" ", parameters.Mandatory()[0].Name));
                }

                Console.WriteLine(Message());
            }
        }