title: Why Obsolete causes error?
body: <p>I use:</p>
  
  <pre><code>[Obsolete("Use AnotherMethod() insted.", false)]
  </code></pre>
  
  <p>2nd parameter is <code>false</code> but Visual Studio shows Warning as Error for every obsolete method call preventing project from compilation. How to make VS mark these calls as Warning not Error?</p>