Entity Framework by default caches the objects retured from the database.
This is convenient, for example, for pseudo-static reference tables, that rarely change and you can accept a restart of your application.
But more times you don't want this, this for example to data updated by multiple front-ends!
So, how can you disable Entity Framework caching?
The solution is:
var query = "some entity framework query"
IList<myEntity> myList = myQuery.ToList();
Having called the Context.Refresh(...) static method before ToList(), makes that the latter one handles correctly inserted and deleted entities, other than updated ones.
You can find a bit more details in the following question+answers page: How to refresh ObjectContext cache from db?.