However, using the two methods BeginUpdate() and EndUpdate() while performing these bulk operations gives significant advantage. A call to BeginUpdate() can be made before adding/deleting/clearing items. This will stop any paint messages being sent or processed. Once the operation is done, the EndUpdate() can then be called.
I have logged the time taken of the above code (i.e. adding 1000 items in a ListView for each button click) with and without the BeginUpdate/EndUpdate method calls using a test application.
The use BeginUpdate() and EndUpdate populates the control with a constant duration and much better performance. Amazing, isn't it?