引入命名空間 using System.IO; using System.Collections; public class FileComparer : IComparer { int IComparer.Compare(Object o1, Object o2) { FileInfo fi1 = o1 as FileInfo; FileInfo fi2 = o2 as FileInfo; return fi1.CreationTime.CompareTo(fi2.CreationTime); } } public class MyClass { public FileInfo[] GetFiles(string path) { DirectoryInfo di = new DirectoryInfo(path); FileInfo[] files = di.GetFiles(); FileComparer fc = new FileComparer(); Array.Sort(files, fc); return files; } } 使用 FileInfo[] a = new MyClass().GetFiles(@"D:\data");

public static string[] GetLatestFiles(string Path, int count) { var query = (from f in Directory.GetFiles(Path,"*.xml") let fi = new FileInfo(f) orderby fi.CreationTime descending select fi.FullName).Take(count); return query.ToArray(); }