namespace EfAndCpf
{
    public class Email
    {
        public string EmailValue { get; private set; }

        private Email()
        {

        }

        private Email(string value)
        {
            EmailValue = value;
        }

        public static implicit operator Email(string value)
            => Parse(value);

        public static implicit operator string(Email email)
            => email.EmailValue;

        public static Email Parse(string value)
        {
            // ... validations here
            // throwing exceptions if something goes wrong.

            return new Email(value);
        }

        public bool IsEmpty => EmailValue == null;

        public override string ToString()
            => EmailValue;
    }
}