using System;

using System.Globalization;

using System.Text;

using System.Text.RegularExpressions;

public static class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var pc = new PersianCalendar();

                var current = DateTime.Now;

                var currentMonth = pc.GetMonth(current);

                var currentYear = pc.GetYear(current);

        Console.WriteLine(currentYear);

        Console.WriteLine(currentMonth);

        var strInput = FixPersianChars("•علی• •احمدی•");

        Console.WriteLine(strInput);

        var regex = new Regex(@"^(?!.*[(@#!%$&*\(\)\<\>\|)])[A-Za-z\s\u0600-\u06FF\s\u0621-\u064A0-9_\.\-]+$");

        Console.WriteLine(regex.IsMatch(strInput));

    }

    public static string FixPersianChars(this string str)

        {

            return str.Replace("ﮎ", "ک")

                      .Replace("ﮏ", "ک")

                      .Replace("ﮐ", "ک")

                      .Replace("ﮑ", "ک")

                      .Replace("ك", "ک")

                      .Replace("ي", "ی")

                      .Replace("ئ", "ی")

                      .Replace("ى", "ی")

                      .Replace(" ", " ")

                      .Replace("•", "")

                      .Replace("ٔ", "")

                      .Replace("ھ", "ه")

                      .Replace("دِ", "د")

                      .Replace("بِ", "ب")

                      .Replace("زِ", "ز")

                      .Replace("شِ", "ش")

                      .Replace("سِ", "س");

        }

}