title: Can I run 'Unit Test App' on Windows Phone 8.1 device via Visual Studio 2015
body: <p>this is my development environment, </p>
  
  <pre><code>Windows 10
  Visual studio 2015 professional 
  </code></pre>
  
  <p>this is my target, </p>
  
  <pre><code>run unit test on the windows phone 8.1 device
  </code></pre>
  
  <p>this is my question, </p>
  
  <p>I create empty <strong>Unit Test App (Windows Phone) Visual C++</strong> project, </p>
  
  <ol>
  <li>I run the default empty test under Debug x86, it works on emulator. </li>
  <li>I changed x86 to ARM and connect with Windows Phone 8.1 device, it doesn't work, and display the message:  
  
  <blockquote>
    <p>PhoneUnitTestApp1.dll cannot be run. Please create a Windows Store or Windows Phone Unit Test project.</p>
  </blockquote></li>
  </ol>
  
  <p>I don't understand the message. The project I created is <strong>Windows Phone Unit Test project</strong> already. How do I run the Unit test on the device? </p>