private void BuildPackageInfoFile(long contentOriginalSize, long contentZippedSize)
{
PackageInfo pi = new PackageInfo();
pi.PackagePath = this.levelName + ".zip";
pi.Size = contentOriginalSize;
pi.ZippedSize = contentZippedSize;
var mapfileContent = JsonConvert.SerializeObject(pi);
// for every package alwasy use the same package name.
// lesson_221.json
var saveTo = this.constants.LocalContentPath + @"\level_" + this.level.Id + "_" + this.constants.CultureCode + ".pinfo";
MapfileHelper.Save(mapfileContent, saveTo);
}