DirectoryInfo dir = new DirectoryInfo("K:\\VGD-103");
FileInfo[] files= dir.GetFiles("*.rar");
Array.Sort(files, (f1, f2) => f1.Length.CompareTo(f2.Length)); //排序檔案大小
foreach (FileInfo f in files)
Console.WriteLine("{0}\t{1}",f.Name,f.Length/1024);
system.io - How to sort an array of FileInfo[] C# - Stack Overflow
