title: Add multiple include directories from a txt file
body: <p>I have a text file with many many paths that need to be added to: <strong>Additional Include Directories</strong>. 
  Is there a possibility to copy all of them at once or include them directly from a txt file?</p>
  
  <p>I have seen this SO post: <a href="https://stackoverflow.com/questions/42353903/recursive-include-paths-in-visual-studio-2015?utm_medium=organic&amp;utm_source=google_rich_qa&amp;utm_campaign=google_rich_qa">Recursive Include Paths in Visual Studio 2015</a></p>
  
  <p>Which suggest a syntax such as:
  /I "MY_PATH/TO/INCLUDE/DIR"</p>
  
  <p>and then use: <strong>@IncludeDirs.txt</strong> to the <strong>Additional Include Directories</strong>. But it does not seem to work for me. I placed the txt file in the root folder of the solution. </p>