C#獲取項目指定目錄下的文件

 public List<FileInfo> GetFiles() {            

            string path = string.Concat(System.AppDomain.CurrentDomain.BaseDirectory,"Files\\");    //獲取項目物理路徑      
            string[] fileType=new string[]{"pdf\\","pps\\","xls\\"};           
            string[] directoryFiles = new string[] { };          
            List<FileInfo> fileInfoList = new List<FileInfo>();
            for (int f = 0; f < fileType.Count(); f++) {
                path = path + fileType[f];
                directoryFiles=System.IO.Directory.GetFiles(path);                
                for(int d=0;d<directoryFiles.Count();d++){                  
                    FileInfo fileInfo = new FileInfo(directoryFiles[d]);
                    fileInfoList.Add(fileInfo);
                }