Question

how is it possible to delete double-entries from a ListBox? Let’s say I’ve got the following Listbox:

5
4
6
4
7
5

As a result I want to have this one:

5
4
6
7

Thank you for your help.

Answer 1

while adding your items to list, u use loop to add.

foreach(int item in yourList)
{
if(!listBox1.Items.Contains(item))
{
//add
}
}

this is the way to add unique numbers
if you use direct datasource, Jon Skeet’s answer is for you.