I just upgraded some systems to Windows 10 Creators Update and I noticed that the windows forms PropertyGrid
control changed its default visual style for header
We are reverting header color to InactiveBorder in the default windows theme in the next release of the .Net Framework, which most likely will be included in the Windows 10 Fall Creators Update. The reason this change was introduced, was that the foreground and background colors were not contrasting enough in one of the High Contrast themes, this is why we are reverting to the previously used color only in the default theme. For your reference, internal work item number, that will be also mentioned in release notes for .Net Framework 4.7.1, is 407249.
Thank you, Tanya