"Object reference not set to an instance of an object" error in vs13

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Im usind cs 2013 for windos an when i try to debugg this error happens: "Object reference not set to an instance of an object" in:

{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            this.Frame.Navigate(typeof(WelcomePage));
        }
    }
}

in the navigation line. how can i fix this?

asked 1 min ago

user3142504

1