Trouble using App.Config ConnectionString (String works don't understand code)

[maurices5000]

I'm using VS2010 on XP.

Below is the app.config file i'm trying to use. I don't understand the part about the connection string. I have two calls to the database that uses this same connection string, but i don't know how to use it.

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

<connectionStrings>
               <add name="ConnectionString"  providerName="System.Data.SqlClient"
	    connectionString="Data Source = cwsqldb; Initial Catalog =
                 Annuals; Integrated Security = True" />
</connectionStrings>


	<appSettings>
		<add key="fromAddress" value="[email protected]"/>
                          <add key ="ToAddress" value ="[email protected]"/>
		<add key="ToBcc" value="[email protected]"/>
		<add key="subject" value="codeworth Connection Audit Alert"/>
		<add key ="smtp" value="mail88-gwy"/>
	</appSettings>

</configuration>

I know I can access the <add key=""> values with the following code.

string fromAddress = ConfigurationManager.AppSettings["fromAddress"].ToString();
string ToAddress = ConfigurationManager.AppSettings["ToAddress"].ToString();

But how do i access the connection string? I don't understand that block of code AT ALL! I understand that the connection string is composed of different parts. But i've always seen it as basically one long string separated by semicolons.

Thanks for your help!