Any help please? I tried adding a handler on selectedindexchanged...but it doesn't hit it if I am clicking on the same selectedItem.
Best How To :
I fixed my issue as Andrew pointed out, by setting the SelectedIndex = -1; But, this created weird behavior since now I would have A checkboxList being populated from the selected list item I chose, and there was no Idea to see which list item populated it after wards.
So What I did was added 2 more lines of code on top of what andrew suggested and it worked great.
var index = lstGroups.SelectedIndex;
lstGroups.SelectedIndex = -1;
lstGroups.Items[index].Attributes["style"] = "background-color:lightblue";
Thanks for pushing me in the right direction!