Question

I have a problem when I try to display the list into the textbox. It only displays the last line from the list.txt file. I think for each new line it overwrites the first line from the textbox all the time ? thus showing only the last line from the file ?

what is it I need to think of to get it right ?

private void Form1_Load(object sender, EventArgs e)
        {

            const string f = "list.txt";

            List<string> myList = new List<string>();

            using (StreamReader r = new StreamReader(f))
            {
                string line;
                while ((line = r.ReadLine()) != null)
                {
                    myList.Add(line);
                }
            }


            foreach (string s in myList)
            {

                textBox1.Text = string.Join(Environment.NewLine, s);

            }


        }

Answer 1

Instead of this:

foreach (string s in myList)
{
textBox1.Text = string.Join(Environment.NewLine, s);
}

Try:

textBox1.Text = string.Join(Environment.NewLine, myList);

And also make sure multiline property of textbox1 is set to true.