title: "Normalizing" a CSV file
body: <p>I have a CSV file for help desk calls.  The same ticket might have 1,2, or even 5 records based on the number of updates it has.  (One field is different, all other fields are identical).</p>
  
  <p>I want to take the mostly-duplicate records and create one record with the differences concatenated into it.  Having programmed in the past, but being a newbie to PowerShell, I could use some help.</p>
  
  <p>So, based on a previous question I asked, here's what I have so far.  Assuming data like this:</p>
  
  <pre>ID, Date, Comment
  345, 1/1/16, Moss has reported a fire in the I/T Room
  345, 1/1/16, Never mind, he has sent an e-mail about it.
  346, 1/2/16, Someone on the 5th floor is complaining about a man under her desk.
  347, 2/1/16, Jen says she has broken the Internet.
  347, 2/1/16, Douglas is very angry, we need a fix ASAP!
  347, 2/1/16, Roy was playing a joke on her.  Closing ticket.</pre>
  
  <p>I have the following code:</p>
  
  <pre><code>$FileList  = Import-Csv "Call List.csv"
  $incidents = $FileList | Group ID
  foreach($group in $incidents)
  {
      # What goes here?
  }
  </code></pre>
  
  <p>How do I take the comments from the 2nd, 3rd, etc. line in the group, concatenate it to the comment in the first, and write the file out?</p>