title: Load Text File data in Combobox for WPF application in C#
body: <p>How to load items in Combo box from a text file? The text file has one item per line. 
  I tried to load data to a string and set the <em>Itemsource</em> with the string</p>
  
  <p><code>string path = @"E:\Testing\WPF_school\WPF_school\Nationality.txt";
              string[] readText = File.ReadAllText(path);</code></p>