Crash when calling Task.Result from UI-Thread

"You cannot call Task methods that block on the UI thread."

Is this documented anywere?

Here is another sample:

/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached.  The Parameter
/// property is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
    // works how i expect it to work
    bool result = DoSomethingAsync().Result;

    // works how i expect it to work
    // this should be just the extended version of the statement above
    Task<bool> task = DoSomethingAsync();
    task.Wait();
    result = task.Result;

    // works fine because this is the nice standard way
    //result = await DoSomethingAsync();    // add async to the signature to use this
}

private Task<bool> DoSomethingAsync()
{
    return Task<bool>.Run( async () =>
        {
            await Test();
            return true;
        });
}

private async Task<bool> Test()
{
    await Task.Delay(1000);
    return true;
}

by actually creating a task i get the behavior i expected.