entity framework - EF6: Why Does Count return 0 but Find return an element? -

in code

using (var db = new dbperson()) {     var b = db.people.create();     b.name = "homer";      db.people.add( b );      console.writeline( "count: {0}", db.people.count() );      foreach (var bb in db.people)         console.writeline( bb.name );      var fb = db.people.find( b.id ); // id guid generated in person ctor                                      //  not db-generated identity.     console.writeline( "found: {0}", fb != null );      db.savechanges();      console.writeline( "count: {0}", db.people.count() ); } 

the output looks this:

count: 0 found: true count: 1 

i have seen other posts count not being updated until savechanges called. ok, "way works".

my question this: why find return object db.people when count() returns 0 , enumerator returns no elements? shouldn't find , count() act similarly, waiting savechanges before returning entities in "added" state?

what reasoning this? ask because writing light-weight non-sql provider needs mirror actions of ef possible. can't figure out logic causes find return added element count() , getenumerator() doesn't. need address these situations.

find() has special quality: first dbcontext's entities have been newly added not yet flushed database (e.g.: entities entitystate.added).

count() , enumerator instead @ database, doesn't have yet until call savechanges().

background info