c# with appropriate standards and guidance at different stages of learning, whet...

代码说明：

c＃标准教程适合与处于不同学习阶段的人，不管你是初学者还是c＃牛人，这本教程对你都很适用．-c# with appropriate standards and guidance at different stages of learning, whether you are a beginner or c# cattle, This guidance is applicable to you.