title: Entity Framework ObjectContext: Concurrency
body: <p>I am trying to use an MVC application with Entity Framework and Repository pattern
  In this application, an end user may modify different entities data through multiple http requests during their session. (kind of wizard pages)
  However they do commit these modifications until a final commit button is clicked 
  These also have the option to leave and this case, their work should be rollbacked.</p>
  
  <p>I am wondering what would happen if two uses are doing the same and one of them clicks the commit button
  I guess changes made by both users are committed !!!</p>
  
  <p>I guess I need to create a object context by user connection or by session
  Your comments are very much welcome</p>