title: ProviderName for Sql Server .SDF file to use in app.config
body: <p>I've created a DB file in a project <code>Add -&gt; New Item -&gt; Local Database</code> and created a table for it.</p>
  
  <p>Now I would like to create a connection string for it in <code>app.config</code>.</p>
  
  <p>The problem is that all example code that I find uses code only to create a connection, and not app.config. Hence I can't figure out which <code>providerName</code> I should use.</p>
  
  <p>So what is it?</p>
  
  <pre><code>&lt;add name="DemoDb" providerName="XXXXXX" connectionString="Data Source=ExampleDb.sdf;Persist Security Info=False;"/&gt;
  </code></pre>