abdelkader

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private async void button1_Click(object sender, EventArgs e)
        {
            await Run();
        }

abdelkader

ds = new DataSet("VehiclesRepairs");

            var vehicles = ds.Tables.Add("Vehicles");
            vehicles.Columns.Add("VIN",typeof(string));
            vehicles.Columns.Add("Make", typeof(string));
            vehicles.Columns.Add("Model", typeof(string));
            vehicles.Columns.Add("Year", typeof(string));
            vehicles.PrimaryKey = new DataColumn[] { vehicles.Columns["VIN"] };

            var repairs = ds.Tables.Add("Repairs");

abdelkader

public class Customer : INotifyPropertyChanged
{
...
    private string _name;
    public string Name
    {
        get { return _name; }

        set {
            if (value != _name)