ListView SelectedIndexChanged Event no Selected Items problem

Yes, the reason is is that when you select another item, the ListView unselects the SelectedItem before selecting the new item, so the count will go from 1 to 0 and then to 1 again. One way to fix it would be to check that the SelectedItems collection contains an item before you try and use it. The way you are doing it is fine, you just need to take this into consideration

eg

if (listView1.SelectedItems.Count == 1)
{
    string logToGet = listView1.SelectedItems[0].Text;
}