Pass Connection string in web

<configuration>
  <connectionStrings>
    <add name="con" connectionString="server=198.52.105.29;database=tirupati;uid=tirupati;pwd=Motors@231;"/>
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.0"/>
  </system.web>
</configuration>

In page

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["con"].ConnectionString);