private static JObject LoadPreviousVersion(string domain)
{
var currentVersion = Assembly.GetExecutingAssembly().GetName().Version;
var parentDirectory = Path.GetDirectoryName(SettingsBase.StorageDirectory);
if (!Directory.Exists(parentDirectory))
{
return(null);
}
var previousVersion = new Version(0, 0);
foreach (var directory in Directory.EnumerateDirectories(parentDirectory))
{
var versionString = Path.GetFileName(directory);
if (versionString == null ||
!System.Version.TryParse(versionString, out var version) ||
version >= currentVersion)
{
continue;
}
if (version > previousVersion)
{
previousVersion = version;
}
}
var previousVersionFile = Path.Combine(
parentDirectory,
previousVersion.ToString(),
SettingsBase.GetSettingsFilename(domain));
if (!File.Exists(previousVersionFile))
{
return(null);
}
try
{
return(JObject.Parse(File.ReadAllText(previousVersionFile)));
}
catch (JsonException)
{
return(null);
}
}
internal static string GetSettingsFilePath(string domain) => Path.Combine(SettingsBase.StorageDirectory, SettingsBase.GetSettingsFilename(domain));