title: Opening Delphi project files - Any downside of opening DPR instead of existing DPROJ file?
body: <p>By default, the file extension descriptions for .DPR and .DPROJ are the same, so in Explorer when opening a project file with the same base name, both file descriptions are listed as "Delphi Project File"  This presents a choice to the developer - which file to open?</p>
  
  <p>I typically open the second file listed, assuming it's the DPROJ.  </p>
  
  <p>Are there any downsides of opening a DPR when there is a corresponding DPROJ file on file?  Does the IDE handle this gracefully?  </p>
  
  <p>I sometimes open the first file listed and I haven't noticed any problems, but it's one of those curiosities remaining unanswered. I looked through the help and couldn't find anything.</p>