Applying StringFormat to TextBox after left focus in debug mode

Question

I have simple view: 
<Grid x:Name="LayoutRoot" Background="White">
<StackPanel Orientation="Horizontal" Margin="5" Height="50">
<TextBox Text="{Binding ValueDouble, Mode=TwoWay, StringFormat='\{0:N2\}'}" Width="50" Margin="5" x:Name="TextBox1"></TextBox>
<TextBox ></TextBox>
</StackPanel>
</Grid>
and simple ViewModel:
public class MainViewModel : INotifyPropertyChanged
private double _valueDouble;
public double ValueDouble
get { return _valueDouble; }
set
_valueDouble = value;
OnPropertyChanged("ValueDouble");
public event PropertyChangedEventHandler PropertyChanged;
[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged(string propertyName)
var handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
If I run application with debugging, after first TextBox has lost focus value stay the same. For example, I has input 42, and after lost focus it still
42.
But if I detach debugger, after first TextBox has lost focus applying correct format. For example, I has input 42, and after lost focus it stay 42.00. 
It very weird and difficult to debug. How to make it works the same in both cases?

Answer 1

There was a similar question a while ago.
IIRC the conclusion was you have to delay the raising of property changed.
Assuming this is the same sort of thing.
Very slightly will do.
Storyboard sb = new Storyboard();
sb.Duration = new TimeSpan(0, 0, 0,0,10);
sb.Completed += new EventHandler(delegate(object s, EventArgs a)
OnPropertyChanged("ValueDouble");
sb.Begin();
Hope that helps.
Recent Technet articles: Property List Editing;
Dynamic XAML