public bool IsCategoryAvailable()
        {
            {
                bool   correctInput = true;
                bool   isAvailable  = false;
                char   sign;
                string input;
                Console.WriteLine("Is Category available? Enter y/n");
                do
                {
                    IsWrongInput(correctInput);

                    try
                    {
                        input        = Console.ReadLine().ToLower();
                        sign         = char.Parse(input);
                        correctInput = ValidateInput.CheckSign(sign, correctInput);
                        isAvailable  = ValidateInput.IsAvailableOrNot(sign, isAvailable);
                    }
                    catch (Exception)
                    {
                        correctInput = false;
                    }
                }while (!correctInput);
                return(isAvailable);
            }
        }