title: visual studio c# does not build files that were change by pre-build event
body: <p>I have solution in visual studio 2010 c#.
  In the pre build event I execute command that change files in this solution.
  The updated file is not built in the current build.
  How can I do that the file, with the changes, will be built in the current build???</p>
  
  <p>Thanks. </p>