插队虽然不违法违规，但这是不道德、没有礼貌的行为，所以插队行为十分无耻，更是让我们感到十分讨厌。只不顾，插队事件发生在这个老师身上，插队被拒绝之后，还辱骂学生家教存在问题。
I have a sample program, which needs to execute 3 methods in a particular order. And after executing each method, should do error handling. Now i did this in a normal fashion, w/o using delegates like
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