public void AddFileStatistics(string path, bool isDirectory, FileStatistics statistics)
{
var extension = isDirectory ? DirectoryExtension : Path.GetExtension(path).ToLowerInvariant();
lock (Lock) {
var s = statistics.CombineWith(ByExtension.GetValueOrDefault(extension));
if (s.Size > 0)
{
ByExtension[extension] = s;
}
if (isDirectory)
{
s = statistics.CombineWith(ByDirectory.GetValueOrDefault(path));
if (s.Size > 0)
{
ByDirectory[path] = s;
}
}
}
}