Regex For "password Must Contain At Least One Non-alphanumeric Character"

I am looking to use regex pattern to replace membership method MembershipCreateStatus.InvalidPassword for Password validation. Criteria for valid password is 'A valid password must

Solution 1:

/([^a-zA-Z\d])+([a-zA-Z\d])+|([a-zA-Z\d])+([^a-zA-Z\d])+/