The problem is you've placed additional code in your Setter. When using Dependency properties the setter is not always called, for example when some other external code calls SetValue passing in SolidGlossTypeProperty and a new value, your setter is not called.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.