If you use the "Format Document" command (ie: Ctrl-k, Ctrl-d) in Visual Studio 2010, the final result is a document where all of the tabs are swapped with spaces.
All that happens although I have set Tools-Options-Text Editor-C#-Tabs
to:
<Smart, 4, 4, Keep tabs>
I found my bug.
It was with all my XAML file that I had my problems. I just realised that there is 2 differents way to fix my bug:
Thanks Eric