title: Root element is missing when running entity framework migration
body: <p>For some reason the migrations history table got wiped from our test database. </p>
  
  <p>To fix this I restored the table from a previous backup. However there wee a few migrations missed. To apply these I commented out all the up() method code. And ran them (the idea being to in comment after I'd ran to update the history table)</p>
  
  <p>However I get the error </p>
  
  <blockquote>
    <p>System.xml.xmlexception root element is missing</p>
  </blockquote>
  
  <p>Any ideas? Obviously the up method is empty in this case. </p>