Annoying Last Empty Row on WPF DataGrid

<Window x:Class="AnnoyingDataGridExtraRow.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        Name="ThisWindow">

    <DataGrid ItemsSource="{Binding ElementName=ThisWindow, Path=MyModels}" AutoGenerateColumns="False">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Strings" Binding="{Binding Text}" />
            <DataGridTextColumn Header="Doubles" Binding="{Binding Value}" />
        </DataGrid.Columns>
    </DataGrid>
</Window>

public partial class MainWindow : Window
{
    public MainWindow()
    {
        MyModels = new List<MyModel>
        {
            new MyModel { Text = "AAA", Value = 0.423 },
            new MyModel { Text = "BBB", Value = 0.315 },
            new MyModel { Text = "CCC", Value = 4.422 }
        };

        InitializeComponent();
    }

    public List<MyModel> MyModels { get; set; }
}

public class MyModel
{
    public string Text { get; set; }

    public double Value { get; set; }
}

If we don't specify a constructor, WPF DataGrid will default to an empty constructor, which allow users to add new row to the grid.

If I change MyModel to something like this:

public class MyModel
{
    public MyModel(string text, double value)
    {
        Text = text;
        Value = value;
    }

    public string Text { get; set; }

    public double Value { get; set; }
}

...then that extra row disappears.

If we want to make the DataGrid readonly, make sure we don't specify an empty constructor. Otherwise we need to set CanUsersAddRows to False.