绑定到ObservableCollection的DataGrid在值更改后不会立即更新

public class Person : INotifyPropertyChanged
{
    private string name;

    public string Name
    {
        get { return name; }
        set
        {
            if (name != value)
            {
                name = value;
                OnPropertyChanged("Name");
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

public class ViewModel
{
    public ObservableCollection<Person> People { get; set; }

    public ViewModel()
    {
        People = new ObservableCollection<Person>()
        {
            new Person() { Name = "John" },
            new Person() { Name = "Jane" }
        };
    }
}

<DataGrid ItemsSource="{Binding People}" AutoGenerateColumns="False">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Name" Binding="{Binding Name}" />
    </DataGrid.Columns>
</DataGrid>