The object cannot be deleted because it was not found in the ObjectStateManager

Question

I am getting this error \"The object cannot be deleted because it was not found in the ObjectStateManager.\"

My code is:

    protected MyEntities sql         


        

Answer 1

Just a small clarification on the answer by Ladislav Mrnka (which should be the accepted answer).

If like me, you've got code in a format like this:

using (var context = new MyDataContext())
{
    context.MyTableEntity.Remove(EntytyToRemove);
    var nrOfObjectsChanged = context.SaveChanges();
}

..then this what you want to do:

using (var context = new MyDataContext())
{
    // Note: Attatch to the entity:
    context.MyTableEntity.Attach(EntityToRemove);

    context.MyTableEntity.Remove(EntityToRemove);
    var nrOfObjectsChanged = context.SaveChanges();
}

Perhaps this seems obvious, but it was not clear to me initially that it is necessary to specify the entity to attatch to, and not just the context.