title: gitignore still including dll files
body: <p>I have a solution with 5 projects. I am using BitBucket for source control.
  I have the following in my .gitignore main root</p>
  
  <pre><code># Compiled source #
  ###################
  
  *.com
  *.class
  *.dll
  *.exe
  *.o
  *.so
  
  # Packages #
  ############
  # it's better to unpack these files and commit the raw source
  # git has its own built in compression methods
  *.7z
  *.dmg
  *.gz
  *.iso
  *.jar
  *.rar
  *.tar
  *.zip
  </code></pre>
  
  <p>However everytime I rebuild the solution, I get changes in my visual studio Team Explorer and I see a list of .dll and .pdb files produced.</p>
  
  <p>How can I fix this?</p>