这个程序可以监视当前系统的设备列表，监视那个设备被加载或卸载，并且，还可以启用、禁用系统设备类别中的任何一个设备节点。-Hardware Helper Library for C# How to monitor, enable, and disable hardware devices from C#. There isn t really a lot of background required for you to use the library I ve provided. The hea

九九乘法表: for (int a = 1 a <= 9 a++) { for (int b = 1 b <= a b++) { x=a*b labelShow.Text += a.ToString() + "X" + b.ToString() + "="+x.ToString()+" \t" }-Multiplication table