void bindingList_BeforeRemove(Form1.myInt deletedItem)
 {
     MessageBox.Show("You've just deleted item with value " + deletedItem.myIntProp.ToString());
 }
 void bindingList_myIntOldNew(Form1.myInt oldItem, Form1.myInt newItem)
 {
     MessageBox.Show("You've just CHANGED item with value " + oldItem.myIntProp.ToString() + " to " + newItem.myIntProp.ToString());
 }