Cloning data on Entity Framework [duplicate]

To clone an Entity in Entity Framework you could simply Detach the entity from the DataContext and then re-add it to the EntityCollection.

context.Detach(entity);
entityCollection.Add(entity);

Update for EF6+ (from comments)

context.Entry(entity).State = EntityState.Detached;
entity.id = 0;
entity.property = value;
context.Entry(entity).State = EntityState.Added;
context.SaveChanges();