如何用C#读取D盘所有子目录下名为“123”的txt文件

如何用C#读取D盘所有子目录下名为“123”的txt文件

static void Main(string[] args)
        {
            DirectoryInfo di = new DirectoryInfo("D:\");
            Foo(di);
            Console.ReadKey(false);
        }

        static void Foo(DirectoryInfo di)
        {
            if (!di.Exists) return;
            DirectoryInfo[] dis = di.GetDirectories();
            for (int i = 0; dis != null && i < dis.Length; i++)
            {
                try
                {
                    Foo(dis[i]); // 递归扫描指定物理硬盘
                }
                catch (Exception)
                {
                    continue;
                }
            }

            FileInfo[] fis = di.GetFiles();
            for (int i = 0; fis != null && i < fis.Length; i++)
            {
                try
                {
                    if (fis[i].Name == "123.txt")
                    {
                      // 若找到了，则输出它所在的物理路径
                        Console.WriteLine(String.Format("{0}\{1}", di.FullName, fis[i].Name));
                    }
                }
                catch (Exception)
                {

                    continue;
                }
            }
        }