using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        string strEmailID;

            string strEmailPassword;

            string strPersonalEmailID;

            string strPersonalEmailPassword;

            string strError;

​

            Console.WriteLine("Enter your Email Id:");

            strEmailID = Console.ReadLine();

​

            Console.WriteLine("Enter your Email Password:");

            strEmailPassword = Console.ReadLine();

​

            Console.WriteLine("Enter your personal Email Id:");

            strPersonalEmailID = Console.ReadLine();

​

            Console.WriteLine("Enter your personal Email Password:");

            strPersonalEmailPassword = Console.ReadLine();

​

            PersonalEmailAccount objValidateEmailAccount = new PersonalEmailAccount();

            Console.WriteLine("\nResult :");

            if (objValidateEmailAccount.ValidatePassword(strEmailID, strEmailPassword, out strError))

                Console.WriteLine("Your Email and Password are correct");

            else

                Console.WriteLine(strError);

​

            if(objValidateEmailAccount.ValidatePersonalEmailAccount(strPersonalEmailID, strPersonalEmailPassword, out strError))

                Console.WriteLine("Your Personal Email and Password are correct");

            else

                Console.WriteLine(strError);

​

            Console.ReadLine();

        }

​

    }

​

    public class ValidateEmailAccount

    {

        public bool ValidatePassword(string Email, string Password, out string ErrorMessage)

        {

            try

            {

                ErrorMessage = string.Empty;

​

                if (string.IsNullOrWhiteSpace(Email))

                {

                    throw new Exception("Email should not be empty");

                }

                if (string.IsNullOrWhiteSpace(Password))

                {

                    throw new Exception("Password should not be empty");

                }

​

                var hasEmail= new Regex(@"\w+([-+.]\w+)*@(yahoo\.com|gmail\.com)");

                var hasNumber = new Regex(@"[0-9]{1,1}");

                var hasUpperChar = new Regex(@"[A-Z]{1,1}");

                var hasMiniChars = new Regex(@".{8,8}");

                var hasLowerChar = new Regex(@"[a-z]{5,5}");

                var hasSymbols = new Regex(@"[!@#$%^&*()_+=\[{\]};:<>|./?,-]{1,1}");

​

                if (!hasEmail.IsMatch(Email))

                {

                    ErrorMessage = "Email id account should be either gmail.com or yahoo.com";

                    return false;

                }

                if (!hasLowerChar.IsMatch(Password))

                {

                    ErrorMessage = "Password should contain one lower case letter.";

                    return false;

                }

                else if (!hasUpperChar.IsMatch(Password))

                {

                    ErrorMessage = "Password should contain one upper case letter.";

                    return false;

                }

                else if (!hasMiniChars.IsMatch(Password))

                {

                    ErrorMessage = "Password should contain 8 characters.";

                    return false;

                }

                else if (!hasNumber.IsMatch(Password))

                {

                    ErrorMessage = "Password should contain one numeric value.";

                    return false;

                }

​

                else if (!hasSymbols.IsMatch(Password))

                {

                    ErrorMessage = "Password should contain one special case character.";

                    return false;

                }

                else

                {

                    return true;

                }

            }

            catch (Exception)

            {

​

                throw;

            }

        }

    }

​

    public class PersonalEmailAccount : ValidateEmailAccount

    {

        public bool ValidatePersonalEmailAccount(string Email, string Password, out string ErrorMessage)

        {

            try

            {

                ErrorMessage = string.Empty;

​

                if (string.IsNullOrWhiteSpace(Email))

                {

                    throw new Exception("Personal Email ID should not be empty");

                }

                if (string.IsNullOrWhiteSpace(Password))

                {

                    throw new Exception("Personal Password should not be empty");

                }

​

                var hasChars = new Regex(@".{8,10}");

                var hasEmail = new Regex(@"\w+([-+.]\w+)*@(yahoo\.com|gmail\.com)");

​

                if (!hasEmail.IsMatch(Email))

                {

                    ErrorMessage = "Personal Email id account should be either gmail.com or yahoo.com";

                    return false;

                }

​

                if (!hasChars.IsMatch(Password))

                {

                    ErrorMessage = "personal Email Password should not contain lessthan 8 characters and greater than 10 characters.";

                    return false;

                }

                else

                {

                    return true;

                }

            }

            catch (Exception)

            {

​

                throw;

            }

        }

    }

​