title: Cannot do migration in Visual Studio 2015 using Entity Framework 6.1.3
body: <p><strong>Problem</strong></p>
  
  <blockquote>
    <p>The term 'enable-migrations' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again. </p>
    
    <p>At line:1 char:18<br>
    + enable-migrations &lt;&lt;&lt;&lt;<br>
        + CategoryInfo          : ObjectNotFound: (enable-migrations:String) [], CommandNotFoundException<br>
        + FullyQualifiedErrorId : CommandNotFoundException .</p>
  </blockquote>
  
  <p>I work in Visual Studio 2015, with ASP.NET MVC 5 &amp; Entity Framework 6.1.3</p>
  
  <p>Suddenly when I do <code>enable-migrations</code>, it's not working, also <code>update-database</code> and add migrations are not working.</p>
  
  <p>I work on Windows 7 64 bit.</p>