title: Optimizing Visual Studio solution build - where to put DLL files?
body: <p>I found out that build time of C# solution with many projects gets much faster if you don't have "copy local" enabled everywhere.  I did some tests and it seems that (for our solution at least) we could increase build time by factor 2-3 just by removing "Copy local". This probably means we have to store libraries in some common directory.</p>
  
  <p>Any suggestion/best practices how to acheive this? Note that I would like to keep references to projects, not to DLLs.</p>