ConfigurationManager Class

paul it work like I mention, the ConfigurationManager.AppSettings will hold the NameValueCollection for the current application which in your case is Project 2. If you want to trace the code you can open the class with .NET Reflector and see what it is doing internally.

Below is a fragment from the internal initializer 

internal ClientConfigurationSystem() {     this._configSystem = new ConfigSystem();     this._configSystem.Init(typeof(ClientConfigurationHost), new object[2]);     this._configHost = (ClientConfigurationHost) this._configSystem.Host;     this._configRoot = this._configSystem.Root;     this._configRoot.ConfigRemoved += new InternalConfigEventHandler(this.OnConfigRemoved);     this._isAppConfigHttp = this._configHost.IsAppConfigHttp;     string schemeDelimiter = Uri.SchemeDelimiter; } 

Hi,
As suthish said storing values in XML file... retrieve those values using code behind logic is the better approach....

Hi,
Project 1 is the procesing module which contains the 'empty' App.Config file and the call to read parameters from the App.Config file (in Project 2) is of Output Type 'Class Library'.
Project 2, which contains the App.Config file with the actual parameters, is a testing harness used to unit test Project 1.  This is awindows application.
Note that:=
The startup project is Project2 (as you would expect, it is the testing harness)
In the Solution properties, Project2 is dependent on Project 1, so the build order must be Project1, then Project 2.
Thanks
Paul