Unable to edit XAML Property, Yellow border in VS2012

Question

Im trying to edit a BorderBrush (edit: or indeed any element that requires color picker) in the VS2012 Properties pane.

After selecting the border element in the MainWindow I select Brush > BorderBrush >Solid color brush in the property pane.

There is a yellow border around the Color Picker and RGBA values and im not able to change anything in the editor, I can enter values fine into the MainWindow Element XAML ie BorderBrush="#FF777777" I just cant set them with the property editor!

What can I do to get the editor working?

Answer 1

The only solution I have found to date is to re-start VS2012.

Answer 2

In VS2015 exists button "Disable project code" above XAML Editor (Zoom, Rendering effect, Show snap grid, ..., Disable project code). This help me