This is not a bug ,is by designed Posted on September 1, 2014 by zhongdaiqi when u have a glance to <[C#4.0本质论(第3版)].(Essential.C#4.0).Mark.Michaelis.文字版.pdf>,u will find a blank page.Yeah,it is not a bug,the write told us ”This page intentionally left blank”,I just want to say too cool & “Ken[g] Die”.