Thank you for contacting us.
By design the selection should not exist at the first place. I have logged this issue in our Feedback Portal. The issue can be found on the following url - UI for Winforms Feedback Portal - FIX. RadPropertyGrid - VisualStudio2012Light theme changing a property leaves a selection, scrolling out of view clears the selection
. I have updated your Telerik Points for bringing this problem into our attention.
As a workaround you can find the attached, modified VisualStudio2012Light
theme. It can be loaded and set as follows:
ThemeResolutionService.ApplicationThemeName = "VisualStudio2012LightModified";
I hope this helps.