Earlier, I tried async/await for [selectivity](https://github.com/madskristensen/WebEssentials2013/blob/c1fd425fdf58d5e14d2ce4ff06b72ef7df71d317/EditorExtensions/CSS/QuickInfo/Selector/SelectorQuickInfo.cs#L66), it was always failing with null. However, `.Result` did the trick (no error, freezing or delay since).