using System;

public class ValidateEmailAccount

{

    public int GetAtCount(string mailAddress)

    {

        int count = 0;

        foreach(var character in mailAddress)

        {

            if(character == '@')

                count++;

        }   

        return count;

    }

    public bool ValidateDomain(string[] splitMailAddress)

    {

        if(splitMailAddress[1].Equals("gmail.com") || splitMailAddress[1].Equals("yahoo.com"))

            return true;

        else

            return false;

    }

    public bool ValidateMail(string mailAddress)

    {

        bool containsAtSign = mailAddress.Contains("@") && (this.GetAtCount(mailAddress) == 1);

        bool vaildDomain = false;

        if(containsAtSign)

            vaildDomain = this.ValidateDomain(mailAddress.Split('@'));

        return (containsAtSign && vaildDomain) ? true : false;

    }   

    public bool ValidatePassword(string password)

    {

        if(password.Length == 8)

        {

        }

        return false;

    }   

    public bool VerifyEmailAccount(string eMail, string password)

    {

        if(this.ValidateMail(eMail) && this.ValidatePassword(password))

            return true;

        else

            return false;

    }

}

public class Program

{

    public static void Main()

    {

        ValidateEmailAccount accountDetails = new ValidateEmailAccount();

        bool validationStatus = accountDetails.VerifyEmailAccount("mugil@gmail.com","abcdeF1!");

        Console.WriteLine(validationStatus.ToString());

    }

}