前言：遍历文件夹及遍历子文件夹可参考如下操作

public class DirectoryAllFiles
        {
            static List<FileInformation> FileList = new List<FileInformation>();
            public static List<FileInformation> GetAllFiles(DirectoryInfo dir)
            {
                FileInfo[] allFile = dir.GetFiles();
                foreach (FileInfo fi in allFile)
                {
                    FileList.Add(new FileInformation { FileName = fi.Name, FilePath = fi.FullName });
                }
                DirectoryInfo[] allDir = dir.GetDirectories();
                foreach (DirectoryInfo d in allDir)
                {
                    GetAllFiles(d);
                }
                return FileList;
            }
        }

        public class FileInformation
        {
            public string FileName { get; set; }
            public string FilePath { get; set; }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //刷新
            //读取所有目录
            //自动更新程序列表
            string dir = Application.StartupPath;
            List<FileInformation> list = DirectoryAllFiles.GetAllFiles(new System.IO.DirectoryInfo(dir));
            if (list.Where(t => t.FileName.ToLower().Contains("android")).Any())
            Console.WriteLine("true");
            foreach (var item in list)
            {
                //Console.WriteLine(string.Format("文件名：{0}---文件目录{1}", item.FileName, item.FilePath));
                if (item.FileName.Contains("1.exe"))
                {
                    ListViewItem lvitem = new ListViewItem();
                    lvitem.SubItems[0].Text = item.FileName;
                    lvitem.SubItems.Add(item.FilePath); //strs[1] 目录
                    listView1.Items.Add(lvitem);
                }
            }
        }