public static class RichTextBoxHelper
{
    public static void WriteLine(this RichTextBox txtLog, object line)
    {
        txtLog.AppendText(line + Environment.NewLine);
    }
}

private void selectToolStripMenuItem_Click(object sender, EventArgs e)
{
    var vehicles = new List<Tuple<string, string, int>>
    {
        Tuple.Create("123","VW",1999),
        Tuple.Create("234","Ford",2009),
        Tuple.Create("567","Audi",2005),
        Tuple.Create("678","Ford",2003),
        Tuple.Create("789","Mazda",2003),
        Tuple.Create("999","Ford",1965)
    };

    var fordCars = vehicles.Where(v => v.Item2 == "Ford")
                         .Select(v => new Car
                         {
                             VIN = v.Item1,
                             Make = v.Item2,
                             Year = v.Item3
                         });

    foreach (var item in fordCars)
        txtLog.WriteLine("Car VIN:{0} Make:{1} Year:{2}", item.VIN, item.Make, item.Year);
}