For an object, can I get all its subclasses using reflection or other ways?

You can load all types in the Assembly and then enumerate them to see which ones implement the type of your object. You said 'object' so the below code sample is not for interfaces. Also, this code sample only searches the same assembly as the object was declared in.

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.