public struct Identifier
    {
        private string name;
        private string email;

        public bool Equals(Identifier other)
        {
            return string.Equals(name, other.name) && string.Equals(email, other.email);
        }

        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            return obj is Identifier && Equals((Identifier) obj);
        }

        public override int GetHashCode()
        {
            unchecked
            {
                return ((name != null ? name.GetHashCode() : 0)*397) ^ (email != null ? email.GetHashCode() : 0);
            }
        }
    }