C# - Read File into Listbox

    static void ReadFile(string _file)
    {
        List<string> lines = new List<string>();
        using (StreamReader r = new StreamReader(_file))
        {
            string line;
            while ((line = r.ReadLine()) != null)
            {
                lines.Add(line);
            }
        }
        foreach (string s in lines)
        {
            listBox1.Items.Add(s);
        }
    }