显示网卡流速的程序，采用C#2010开发，通过一个下拉菜单选择要查询的网卡，显示选中网卡网速，可以设置有边框或者无边框-NIC flow rate of the program, the development of C# 2010, a drop-down menu to select the card you want to query, display the selected NIC network speed and can set the border or no border.