title: Something wrong with app.config (SQL Server Express)
body: <p>In my app.config:</p>
  
  <pre><code>&lt;add name ="connSpionshopString" connectionString="Data
  Source=.\SQLEXPRESS;;AttachDbFileName=|DataDictionary|Spionshop.mdf;
  Integrated Security=True;User Instance=True"/&gt;
  </code></pre>
  
  <p>And in my form.cs:</p>
  
  <pre><code>SqlConnection conn2 = new SqlConnection();
          conn2.ConnectionString = ConfigurationManager
                                   .ConnectionStrings["connSpionshopString"]
                                   .ConnectionString;
  </code></pre>
  
  <p>This always gets an error: "Invalid v alue for key 'attachdbfilename'."</p>
  
  <p>I don't know what's wrong with this.. :(</p>