How to add lines of a text file into individual items on a ListBox (C#)

Question

How would it be possible to read a text file with several lines, and then to put each line in the text file on a separate row in a ListBox?

The code I have so far:

Answer 1

Write a helper method that return the collection of lines

   static IEnumerable ReadFromFile(string file) 
    {// check if file exist, null or empty string
        string line;
        using(var reader = File.OpenText(file)) 
        {
            while((line = reader.ReadLine()) != null) 
            {
                yield return line;
            }
        }
    }

use it

var lines = ReadFromFile(myfile);
myListBox.ItemsSource = lines.ToList(); // or change it to ObservableCollection. also you can add to the end line by line with myListBox.Items.Add()