How do I delete selected item from the listbox. The content of the listbox is from a text File and I use StreamReader to read all content in the textfile and display in the listbox. And If i delete it, will it update the textfile ?

Populate listbox

```
        public void Outbound_load()
    {
        Listbox1.Items.Clear();
        using (StreamReader sr = new StreamReader("C:\\Users\\jason\\Desktop\\Outbound.txt"))
        {
            string line;
            // Read and display lines from the file until the end of  
            // the file is reached. 
            while ((line = sr.ReadLine()) != null)
            {
                Listbox1.Items.Add(line);
            }
            sr.Close();
        }
    }

```