title: How can I change my connectionString in app.config file at runtime?
body: <p>I created my vb.net project to .exe file.
  During installation on another machine, one can change the location of installing package to any drive.
  In my project, I have set my <strong>app.config</strong> to point the Database that is available in <strong>c:\project</strong>.
  If I suppose, while installation, when I change the location of installation to **d:** or anywhere, I get <code>invalid access db</code>. 
  What I want is:</p>
  
  <p>I want to reconfigure my <strong>app.config</strong> file automatically, by detecting its current db location.</p>