04. Password Validator

using System;

namespace _04._Password_Validator
{
    class Program
    {
        static void Main(string[] args)
        {
            string password = Console.ReadLine();
            bool isValidPassword = true;

            bool isValidChekPasswordLength= ChekPasswordLength(password, isValidPassword);
            bool isValidChekPasswordConsistLettersDigits= ChekPasswordConsistLettersDigits(password, isValidPassword);
            bool isValidChekPasswordLeastTwoDigits= ChekPasswordLeastTwoDigits(password, isValidPassword);
            ChekPasswordValid(isValidChekPasswordLength, isValidChekPasswordConsistLettersDigits, isValidChekPasswordLeastTwoDigits);
        }

        static bool ChekPasswordLength(string password, bool isValidPassword)
        {
            if (password.Length < 6 || password.Length > 10)
            {
                Console.WriteLine("Password must be between 6 and 10 characters");
                isValidPassword = false;
            }
            return isValidPassword;
        }

        static bool ChekPasswordConsistLettersDigits(string password, bool isValidPassword)
        {
            double passwordLettersDigits = 0;
            for (int i = 0; i < password.Length; i++)
            {
                char symbol = password[i];

                if ((password[i] >= 48 && password[i] <= 57) ||
                    (password[i] >= 65 && password[i] <= 90) ||
                    (password[i] >= 97 && password[i] <= 122))
                {
                    passwordLettersDigits++;
                }
            }
            if (passwordLettersDigits != password.Length)
            {
                Console.WriteLine("Password must consist only of letters and digits");
                isValidPassword = false;
            }
            return isValidPassword;
        }

        static bool ChekPasswordLeastTwoDigits(string password, bool isValidPassword)
        {
            double passwordLeastTwoDigits = 0;

            for (int i = 0; i < password.Length; i++)
            {
                char symbol = password[i];
                if (password[i] >= 48 && password[i] <= 57)
                {
                    passwordLeastTwoDigits++;
                }
            }
            if (passwordLeastTwoDigits < 2)
            {
                Console.WriteLine("Password must have at least 2 digits");
                isValidPassword = false;
            }
            return isValidPassword;
        }

        static void ChekPasswordValid(bool isValidChekPasswordLength,
            bool isValidChekPasswordConsistLettersDigits,
            bool ChekPasswordLeastTwoDigits)
        {
            if (isValidChekPasswordLength==true &&
            isValidChekPasswordConsistLettersDigits==true &&
            ChekPasswordLeastTwoDigits == true)
            {
                Console.WriteLine("Password is valid");
            }
        }
    }
}