在USB\VID_05A9&PID_2800\5&1BFE1C47&0&8里面，USB代表设备类型，
5&1BFE1C47&0&8代表设备连接位置，包括总线位置，控制器位置，控制器编号，端口编号这几项，
而VID_05A9&PID_2800则是设备信息，USB的驱动也正是依赖于这个，
VID其实是Vendor ID(生产厂商ID)，PID则是Product ID（产品ID），分别代表生产商的编号和生产商内部的产品编号。
原则上说一个USB设备必须有PID和VID，属于USB接口芯片的可选设置。

///////////////////////////即插即用总线信息/////////////////////////////
ManagementObjectSearcher mos0 = new ManagementObjectSearcher(@"select * from Win32_Bus where DeviceID like 'PNP_BUS%'");
            foreach (ManagementObject mo in mos0.Get())
            {
                foreach (PropertyData p in mo.Properties)
                {
                    Console.WriteLine(p.Name + "--------" + p.Value);
                }
            }

/////////////////////////////////USB控制器以及连接的设备/////////////////////////////////
ManagementObjectSearcher moc1 = new ManagementObjectSearcher(@"select * from Win32_USBController where Manufacturer='Intel'");
            foreach (ManagementObject mo1 in moc1.Get())
            {
                foreach (PropertyData p in mo1.Properties)
                {
                    Console.WriteLine(p.Name + "--------" + p.Value);
                }
            }

//////////////////////USB控制器以及当前与他们相关联的设备的集合//////////////////////
ManagementObjectSearcher mos1 = new ManagementObjectSearcher(@"select * from Win32_USBControllerDevice");
            foreach (ManagementObject mo1 in mos1.Get())
            {
                foreach (PropertyData p in mo1.Properties)
                {
                    Console.WriteLine(p.Name + "--------" + p.Value);
                }
            }

////////////////////////////////即插即用的某一个USB设备//////////////////////////////////
ManagementObjectSearcher mos = new ManagementObjectSearcher(@"select * from Win32_PnPEntity where DeviceID like '%usb%mi%' and (Manufacturer like 'microsoft' or Service='usbvideo')");
            foreach (ManagementObject mo in mos.Get())
            {
                foreach (PropertyData p in mo.Properties)
                {
                    if ((p.Name == "Caption") || (p.Name == "ClassGuid") || (p.Name == "DeviceID") || (p.Name == "PNPDeviceID"))
                    {
                        Console.WriteLine(p.Name + "--------" + p.Value);
                    }
                }
            }