I'm currently working on a project in Visual Studio 2015, a WPF project (if that matters) using C# and XAML. and using .NET Framework 4.6 version. while working suddenly the XAML Autocomplete stopped working (stopped showing all Members, Controls Types...etc) and instead is showing these items (!--, [!CDATA[, ?). what is the reason behind that and how can i fix it (possibly without having to restart visual studio)?