c# - USB设备在C#中设置属性

Question

我有这段代码：

DriveInfo[] myDrives = DriveInfo.GetDrives();
foreach (DriveInfo myDrive in myDrives)
{
    if (myDrive.DriveType == DriveType.Removable)
    {
        string path = Convert.ToString(myDrive.RootDirectory);
        DirectoryInfo mydir = new DirectoryInfo(path);
        String[] dirs = new string[] {Convert.ToString(mydir.GetDirectories())};
        String[] files = new string[] {Convert.ToString(mydir.GetFiles())};

        foreach (var file in files)
        {
            File.SetAttributes(file, ~FileAttributes.Hidden);
            File.SetAttributes(file, ~FileAttributes.ReadOnly);
        }

        foreach (var dir in dirs)
        {
            File.SetAttributes(dir, ~FileAttributes.Hidden);
            File.SetAttributes(dir, ~FileAttributes.ReadOnly);
        }        
    }
}

我有个问题。它首先尝试软盘驱动器的代码，并且因为其中没有软盘，所以它抛出了错误我该The device is not ready.如何防止呢？