C#读取U盘序列号

private List<string> _serialNumber = new List<string>();

/// <summary>
/// 调用这个函数将本机所有U盘序列号存储到_serialNumber中
/// </summary>
private void matchDriveLetterWithSerial()
{
    string[] diskArray;
    string driveNumber;
    var searcher = new ManagementObjectSearcher("SELECT * FROM Win32_LogicalDiskToPartition");
    foreach (ManagementObject dm in searcher.Get())
    {
        getValueInQuotes(dm["Dependent"].ToString());
        diskArray = getValueInQuotes(dm["Antecedent"].ToString()).Split(',');
        driveNumber = diskArray[0].Remove(0, 6).Trim();
        var disks = new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive");
        foreach (ManagementObject disk in disks.Get())
        {
            if (disk["Name"].ToString() == ("\\\\.\\PHYSICALDRIVE" + driveNumber) & disk["InterfaceType"].ToString() == "USB")
            {
                _serialNumber.Add(parseSerialFromDeviceID(disk["PNPDeviceID"].ToString()));
            }
        }
    }
}
private static string parseSerialFromDeviceID(string deviceId)
{
    var splitDeviceId = deviceId.Split('\\');
    var arrayLen = splitDeviceId.Length - 1;
    var serialArray = splitDeviceId[arrayLen].Split('&');
    var serial = serialArray[0];
    return serial;
}

private static string getValueInQuotes(string inValue)
{
    var posFoundStart = inValue.IndexOf("\"");
    var posFoundEnd = inValue.IndexOf("\"", posFoundStart + 1);
    var parsedValue = inValue.Substring(posFoundStart + 1, (posFoundEnd - posFoundStart) - 1);
    return parsedValue;
}