I want to make some small modifications to the default control template of some controls in my windows phone 8 app. The problem is that I can\'t find these default templates
You can find the file containing all the default control templates here:
C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v8.0\Design\System.Windows.xaml
Edit: also, the Windows Store Dev Center has a lot of them listed if you search for "styles and templates"