private void btnCalcLength_Click(object sender, EventArgs e)
        {
            double  length = Convert.ToDouble(txtInput.Text);
            Meetlat meet   = new Meetlat(length);

            lblM.Text    = $"{meet.LengteInM}";
            lblCm.Text   = $"{meet.LengteInCm}";
            lblKm.Text   = $"{meet.LengteInKm}";
            lblFeet.Text = $"{meet.LengteInVoet}";
        }
        static void Main(string[] args)
        {
            Meetlat meetLat = new Meetlat(2.5);

            Console.WriteLine($"KiloMeters: {meetLat.LengteInKm:F4}\nMeters: {meetLat.LengteInM:F4}\nCentimeters: {meetLat.LengteInCm:F2}\nVoet: {meetLat.LengteInVoet:F4}");
        }