Methods-Ex\Password Validator

using System;

namespace methods_exerci
{
    class Program
    {
        static void Main(string[] args)
        {

            string password = Console.ReadLine();
            bool isValid = true;

            isValid = PasswordLength(password, isValid);
            isValid = IsLetterOrDigit(password, isValid);
            isValid = IsDigit(password, isValid);

            PasswordIsValid(isValid);

        }

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



        static bool IsLetterOrDigit(string password, bool isValid)
        {
            for (int i = 0; i < password.Length; i++)
            {
                if (!Char.IsLetterOrDigit(password[i]))
                {
                    Console.WriteLine("Password must consist only of letters and digits");
                    isValid = false;
                    break;
                }
            }
            return isValid;
        }

        static bool IsDigit(string password, bool isValid)
        {
            int digit = 0;

            for (int i = 0; i < password.Length; i++)
            {
                if (Char.IsDigit(password[i]))
                {
                    digit++;
                }
            }

            if (digit < 2)
            {
                Console.WriteLine("Password must have at least 2 digits");
                isValid = false;
            }
            return isValid;
        }

        static void PasswordIsValid(bool isValid)
        {
            if (isValid)
            {
                Console.WriteLine("Password is valid");
            }
        }
    }
}