//Clean up local folder, then release current upgrade package.
private static void CleanAndRelease(string zipFilePath, string targetPath)
{
//Upgrade package not found, do nothing.
if (string.IsNullOrEmpty(zipFilePath) || string.IsNullOrEmpty(targetPath))
{
return;
}
CleanUpgradePackage(targetPath);
//Unpack the upgrade package zip to USB.
UpgradePackageUltility.ExtractToDirectory(zipFilePath, targetPath);
}
