Connection string web.config asp.net

<?xml version="1.0"?>

<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->

<configuration>

    <system.web>
      <compilation debug="true" targetFramework="4.5" />
      <httpRuntime targetFramework="4.5" />
    </system.web>
  <connectionStrings>
    <add name="conn" connectionString="Data Source=WIN-PC\SQLEXPRESS;Initial Catalog=st_SubiTechnologies;Integrated Security=True;" providerName="System.Data.SqlClient"/>
    <!--<add name="conn" connectionString="Data Source=.\SQLServer2012;Initial Catalog=st_SubiTechnologies;User Id=subi;Password=ysN9o2^6;Connect Timeout=120;" providerName="System.Data.SqlClient" />-->
  </connectionStrings>
</configuration>