Windows Phone 8 app does not contain a definition for InitializeComponent

Question

I have just downloaded the 14 CTP version of Visual Studio and created a blank app for Windows Phone. I tried to open the MainPage.xaml and the designer shows u

Answer 1

1. “tools”——>"extensions and updates"——>install or update "nuget package manager" and something like that ;
2. try to open as administrator
3. it seems like disk in fat32 will lead to the error
4. if u install Silvertlight before the SDK ,it may lead to the error