❔ Help with StreamReader txt file

private void btnDelete_Click(object sender, EventArgs e)
{
    string path = @"ADDONS\Favorites.txt";
    StreamReader fav = new StreamReader(path);

    string[] lines = File.ReadAllLines(fav.ToString());

    foreach (string line in lines)
    {
        if(line.ToString() == textbox1.Text.ToString())
        {
            line.Replace(line, "");
        }
    }
    fav.Close();
}

private void btnDelete_Click(object sender, EventArgs e)
{
    string path = @"ADDONS\Favorites.txt";
    StreamReader fav = new StreamReader(path);

    string[] lines = File.ReadAllLines(fav.ToString());

    foreach (string line in lines)
    {
        if(line.ToString() == textbox1.Text.ToString())
        {
            line.Replace(line, "");
        }
    }
    fav.Close();
}