01-11 C# 驗證檔案類型 & 讀取檔案標頭 & Stream 多次讀取 | C# validate file type & read file header bytes & Stream read multiple times
08-09 找出某個namespace下所有類別裡面有哪些類別的哪些屬性不是單純的get set | find out class that have not simple getter setter property in specific name space