title: unable to read appsettings when unit testing
body: <p>I have C# console application. One of its function reading <code>appconfig</code> value and do some work.  </p>
  
  <pre><code>string host = ConfigurationManager.AppSettings["Host"]  
  </code></pre>
  
  <p>So I wrote <code>NUNIT</code> test for my console application. Unit testing project was created using class library.</p>
  
  <p>But my unit test is fail now . Because it is not reading my app settings (indicates no app settings). What is the reason for this.<br>
  When I run my console app, it is reading app settings correctly. </p>