title: Error on using custom build task in Microsoft Build Framework
body: <p>I have implemented a custom BuildTask and set the build engine in it.
  But while executing the code, I am getting this exception</p>
  
  <pre><code>Method not found: 'Void Microsoft.Build.Utilities.Task.set_BuildEngine(Microsoft
  .Build.Framework.IBuildEngine)'.
  </code></pre>
  
  <p>What can be possible cause of this?</p>