grid.cs

            DataGrid dg = new DataGrid();
            dg.HorizontalAlignment = HorizontalAlignment.Left;
            dg.VerticalAlignment = VerticalAlignment.Top;

            dg.AutoGenerateColumns = true;
            //the function getData used to get the data from data-source, you can manipulate it.
            getData gd = new getData(); // getData holds getUserRecord() to get the data
            UserData[] data = gd.getUserRecord();
            dg.ItemsSource = data;

            FrameworkElementFactory sp = new FrameworkElementFactory(typeof(StackPanel));
            sp.SetValue(StackPanel.OrientationProperty, Orientation.Horizontal);
            FrameworkElementFactory delete = new FrameworkElementFactory(typeof(Button));
            delete.AddHandler(Button.ClickEvent, new RoutedEventHandler((s, e) => { MessageBox.Show(data[dg.SelectedIndex].id); }));
            delete.SetValue(ContentControl.ContentProperty, "Delete");
            FrameworkElementFactory edit = new FrameworkElementFactory(typeof(System.Windows.Controls.Button));
            edit.AddHandler(Button.ClickEvent, new RoutedEventHandler((s, e) => { MessageBox.Show("edited click!"); }));
            edit.SetValue(ContentControl.ContentProperty, "Edit");
            edit.SetValue(FrameworkElement.MarginProperty, new Thickness(5, 0, 0, 0));
            sp.AppendChild(delete);
            sp.AppendChild(edit);

            DataGridTemplateColumn dataGridTemplateColumn = new DataGridTemplateColumn()
            {
                Header = "new...",
                CellTemplate = new DataTemplate { VisualTree = sp }
            };

            dg.Columns.Add(dataGridTemplateColumn);
            panel1.Children.Add(dg);