Created Unassigned: [Version 2.0] BindingFailure and FileNotFound first chance exceptions on startup [16261]

Hi !

I downloaded this morning the new version (2.0.2000 - changeset 102188).
I updated my source code in order to change the broken "using namespace".

When I launch the debugging session I'm having a BindingFailure exception :
```
BindingFailure a été détecté
Message: L'assembly avec le nom complet 'Xceed.Wpf.AvalonDock.Aero' n'a pas pu se charger dans le contexte de liaison 'Load' de l'AppDomain ayant l'ID 1.
La cause de l'erreur était : System.IO.FileNotFoundException:
Impossible de charger le fichier ou l'assembly 'Xceed.Wpf.AvalonDock.Aero, Version=2.0.0.0, Culture=neutral, PublicKeyToken=3e4669d2f30244f4' ou une de ses dépendances.
Le fichier spécifié est introuvable.
```

Or Google's translation :
```
BindingFailure was detected
Message: The assembly with the full name 'Xceed.Wpf.AvalonDock.Aero' failed to load in the context of binding 'Load' the AppDomain with ID 1.
The cause of the error was: System.IO.FileNotFoundException:
Could not load file or assembly 'Xceed.Wpf.AvalonDock.Aero, Version = 2.0.0.0, Culture = neutral, PublicKeyToken = 3e4669d2f30244f4' or one of its dependencies.
The specified file was not found.
```

There is also a bunch on FileNotFoundException :
```
L'exception System.IO.FileNotFoundException s'est produite
HResult=-2147024894
Message=Impossible de charger le fichier ou l'assembly 'Xceed.Wpf.AvalonDock.XmlSerializers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=3e4669d2f30244f4' ou une de ses dépendances. Le fichier spécifié est introuvable.

Xceed.Wpf.AvalonDock.Layout.Serialization.XmlLayoutSerializer.Deserialize(System.IO.TextReader reader) Ligne 77 C#
Xceed.Wpf.AvalonDock.Layout.Serialization.XmlLayoutSerializer.Deserialize(string filepath) Ligne 107 C#
AvalonDock.MVVMTestApp.MainWindow.MainWindow_Loaded(object sender, System.Windows.RoutedEventArgs e) Ligne 62 C#

Xceed.Wpf.AvalonDock.Layout.LayoutGroup<Xceed.Wpf.AvalonDock.Layout.ILayoutPanelElement>.ReadXml(System.Xml.XmlReader reader) Ligne 219 C#
Xceed.Wpf.AvalonDock.Layout.LayoutPositionableGroup<Xceed.Wpf.AvalonDock.Layout.ILayoutPanelElement>.ReadXml(System.Xml.XmlReader reader) Ligne 297 C#
Xceed.Wpf.AvalonDock.Layout.LayoutPanel.ReadXml(System.Xml.XmlReader reader) Ligne 78 C#
```

The exception only happens if Visual Studio is told to break on first-chance exceptions (Visual Studio top menu -> Debugging -> Exceptions -> select all or only BindingFailure and FileNotFound)

In order to check if my code was causing the exception, I downloaded the AvalonDock source code and I'm having the same issue after customizing the "break on first chance exceptions" settings.

Not a critical issue but as I launch my debugging sessions with all first-chance exceptions enabled, it is quite annoying ! :)