C#获得文件夹下文件名

String path = @"X:\xxx\xxx"; 

//第一种方法
var files = Directory.GetFiles(path, "*.txt"); 

foreach (var file in files)
    Console.WriteLine(file); 

//第二种方法
DirectoryInfo folder = new DirectoryInfo(path); 

foreach (FileInfo file in folder.GetFiles("*.txt"))
{
    Console.WriteLine(file.FullName);
}