You are trying to open a file that is already open and locked, you need to call fi.Close() after your create if you are intending to reuse it as fi.Create() opens a filestream which allows you to read/write the file automatically. I believe by default Create() will just use an existing file if one already exists, so you could just use that to initialize your filestream.
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.