syntax highlighting XAML Visual Studio

问题

I experience some problem with Visual Studio 2015, when I re-installed on my computer, the whole syntax highlighting became all white in XAML, but not in my VB code?

If someone happens to find the solution, I would be extremely grateful to him.

visualization code in visual studio

<Grid.RowDefinitions>
    <RowDefinition Height="5*"/>
    <RowDefinition Height="60*"/>
    <RowDefinition Height="6*"/>
</Grid.RowDefinitions>

来源：https://stackoverflow.com/questions/33541270/syntax-highlighting-xaml-visual-studio