How do I insert lines of a external txt file into the domainupdown items in visual c#?

Question

How do I insert lines of a external text file into the domainupdown items in visual c#? each line of text must correspond to a single items.

domainUpDown.Items.Add(line1);
domainUpDown.Items.Add(line2);
domainUpDown.Items.Add(lines n);

ecc

Answer 1

Adapted from: https://www.dotnetperls.com/file-readalllines

string[] lines = File.ReadAllLines("C:\\rearrange.txt");
foreach(var line in lines)
{
   domainUpDown.Items.Add(line);
}