Sorted files by LastWriteTime

private static List SortFilesByLastWriteTime(string path, string filter)
{
FileInfo[] fi = new DirectoryInfo(path).GetFiles(filter);
List fis = new List();
fis.AddRange(fi);
fis.Sort(new Comparison(
delegate(FileInfo f1, FileInfo f2)
{
return f1.LastWriteTime.CompareTo(f2.LastWriteTime);
}));
return fis;
}