Şunu
web.config'de <system.
web> 'in altına yapıştır istediğin olur.
Kod:
<membership>
<providers>
<clear/>
<!-- minimum 7 ve 1 non-alfanumeric karakter zorunluluğunu ezdik-->
<add name="AspNetSqlMembershipProvider" type="System.web.Security.SqlMembershipProvider, System.web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="LocalSqlServer" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" applicationName="/" requiresUniqueEmail="false" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="4" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" passwordStrengthRegularExpression=""/>
</providers>
</membership>