Config File/ Connection Strings

Hello


I made certain changes in the properties in my Config file and by Change the ServerName and Database Name.
below is the example

When i execute the package it still runs. I mean theer is no server or database with that name but it still works.


<Configuration ConfiguredType="Property" Path="Package.Connections[ConManName].Properties[ConnectionString]" ValueType="String">
<ConfiguredValue>Data Source=UHS137;Initial Catalog=UH_IntegrationStaging;Provider=SQLNCLI.1;Integrated Security=SSPI;Auto Translate=False;</ConfiguredValue>
</Configuration>



Changed to


<Configuration ConfiguredType="Property" Path="Package.Connections[ConManName].Properties[ConnectionString]" ValueType="String">
<ConfiguredValue>Data Source=NOSvr;Initial Catalog=NOdB;Provider=SQLNCLI.1;Integrated Security=SSPI;Auto Translate=False;</ConfiguredValue>
</Configuration>


Then I created a new config file in which I checked in the box for ServerNam and when i change the name teher in the Config file

EXAMPLE


<Configuration ConfiguredType="Property" Path="Package.Connections[ConManName].Properties[ServerName]" ValueType="String">

<ConfiguredValue>NoSvr</ConfiguredValue>

and when executed teh package its fails.

Thats what I neede


SO coming to my question.
1)What is it doing. I mean how is the package talking to this config file
2) Irrespective of what I do in the Connection String the package executes fine, which It should not do as far as my understanding goes. Why is it doesn't matter whats in String. where as it matter in later.