How to set Connection String in Web.Config

---- LOCAL ----
<appSettings>
<add key="ConnectionString" value="Data Source=SERVER NAME;Initial Catalog=DATA BASE NAME;Integrated Security=True"/>
</appSettings>

---- LIVE ----
<appSettings>
<add key="ConnectionString" value="Data source=SERVER IP;Database=DATABASE NAME;Uid=DB USER ID;Password=DB PASSWORD"/>
</appSettings>