gistfile1.cs

namespace DataGridDummy
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            Names= new ObservableCollection<string>(new List<string>(){"Johan"});
            this.DataContext = Names;
            InitializeComponent();

        }

        public ObservableCollection<string> Names { get; set; }
    }

    public class Person
    {
        public string Name { get; set; }
    }
}