title: Entity Framework - implementing IDbSet
body: <p>I would like to implement IdbSet to provide my DbContext a custom implementation that will essentially serve to filter my data for the currently logged in user (I am working on a multi-tenant application).  The general idea I am going with is very similar to this post: <a href="https://stackoverflow.com/questions/5676280/can-a-dbcontext-enforce-a-filter-policy">Can a DbContext enforce a filter policy?</a></p>
  
  <p>However, it is not clear to me how to make DbContext "know" about how to use my own class that implements IDbSet.  I am having a tough time finding documentation on this.  Any pointers would be helpful!</p>
  
  <p>TIA,
  -jle</p>