title: C# Program Update
body: <p>Hi I have a c# project in visual studio 2010 and Im wondering how to do the following</p>
  
  <p>I have deployed this project already to a tester.
  It uses a SQL database in the backend.
  When I published a new version and sent him the new installer he had to remove the old version first which in turn removed his database.</p>
  
  <p>What I'm looking for is a way to publish the project such that it overwrites the old stuff that has changed while leaving his database in tact.</p>
  
  <p>(This would also need to but probably would circumvent the message that you can't install because its already installed in another location)</p>
  
  <p>Thanks in advance for your help</p>