Google是您的朋友.我使用了这个搜索词组("c#检测到USB设备")，这是超过310万次匹配中的第一个:

http://www.dotnet247.com/247reference/msgs/32/164968.aspx [ ^ ]

第二个命中是针对CodeProject上的一篇文章.

谷歌搜索愉快.

Google is your friend. I used this search phrase ("c# detect usb device"), and this was the first of over 3.1 MILLION hits:

http://www.dotnet247.com/247reference/msgs/32/164968.aspx[^]

The second hit is for an article right here on CodeProject.

Happy googling.