1. Disable WCF RIA Service intellisense

[HKEY_LOCAL_MACHINE]\SOFTWARE\Wow6432Node\Microsoft\WCFRIAServices\v1.0

Right click on the right (where the values are) and select NEW > DWord 32 bit value called: DisableLiveIntellisense
Right click the value you just added and select Modify.
Enter the Value 1

2. Disable XAML intellisense

Set the following registry key to 0:
HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\10.0\Text Editor\XAML\Auto List Members