title: ObjectContext.Refresh()?
body: <p>How to update ALL the dirty entities from the data store, and reset their changed values to the original store value?</p>
  
  <p>The method <a href="http://msdn.microsoft.com/en-us/library/bb503718.aspx" rel="noreferrer">ObjectContext.Refresh</a> requires as a parameter the entities to be refreshed.</p>