Why would anyone do Catch (Exception e) { throw e; }?

Question

Why would anyone do this? I do not understand. Can I delete this try-catch block without affecting the code?

try
{
    Collection<SvnLogEventArgs> svnLog = GetSVNRevisionsLog(lastRevision, currentRevision, svnUrl);

    svnInfo = PopulateOutput(svnLog, svnUrl.ToString());
}
catch (Exception e)
{
    throw e;
}

Answer 1

Why would anyone do this?

You shouldn't do this. The closest you should come would be if you wanted to add some logging, in which case you should write:

try
{
  /// Do something
}
catch (Exception e)
{
   LogException(e); // Do some logging
   throw; // Don't use throw e
}

The throw statement, when used alone, preserves the exception call stack information.

That being said, if you don't have other logic (such as logging), there is absolutely no reason to catch the exception. Exceptions should only be caught if you need to either log/process them, or if you can reasonably handle the error and recover properly.