Question

In entity framework you have to write a lot of code for saving or updating a single entity:

 using (DataContext context = new DataContext())
    {
        context.Task.Attach(task);
        if (task.ID == 0)
        {
             context.ObjectStateManager.ChangeObjectState(task, System.Data.EntityState.Added);
        }
        else
        {
             context.ApplyOriginalValues(task.GetType().Name, task);
         }
          context.SaveChanges();
     }

in hibernate it is just saveOrUpdate()

This is not about being lazy, it is about making it short and clean.

Answer 1

There is no equivalent. You really have to write it like:

using (DataContext context = new DataContext())
{
    context.Task.Attach(task);
    if (task.ID == 0)
    {
         context.ObjectStateManager.ChangeObjectState(task, System.Data.EntityState.Added);
    }
    else
    {
         context.ObjectStateManager.ChangeObjectState(task, System.Data.EntityState.Modified);
    }

    context.SaveChanges();
 }