如何在WPF C#中为DataGrid获取TextBoxes中的选定行值

<Grid>
    <DataGrid x:Name="myDataGrid" AutoGenerateColumns="False">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Name" Binding="{Binding Name}" />
            <DataGridTextColumn Header="Age" Binding="{Binding Age}" />
        </DataGrid.Columns>
    </DataGrid>

    <StackPanel Orientation="Horizontal">
        <TextBox x:Name="nameTextBox" />
        <TextBox x:Name="ageTextBox" />
        <Button Content="Add" Click="AddButton_Click" />
    </StackPanel>
</Grid>

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

private ObservableCollection<Person> people = new ObservableCollection<Person>();

public MainWindow()
{
    InitializeComponent();
    myDataGrid.ItemsSource = people;
}

private void AddButton_Click(object sender, RoutedEventArgs e)
{
    string name = nameTextBox.Text;
    int age = int.Parse(ageTextBox.Text);

    people.Add(new Person { Name = name, Age = age });

    nameTextBox.Text = "";
    ageTextBox.Text = "";
}