从列表框中删除数据绑定项会导致刷新问题

I have databound a listbox to a simple custom object collection. Next, I added a button to remove the selected item from the object collection. The problem is that when certain items are removed and the listbox is showing the vertical scroll bar, the scrollbar appears to reset to a new position, although what I really think is happening is that the control is repainting.I have databound a listbox to a simple custom o