C# sharepoint 循环遍历文件夹和所有子文件夹中的所有文件

我试图在文件夹中的所有文件和所有子文件夹中循环播放，其深度与第一个文件夹中的深度相同。我找到了一种方法，但我认为它很愚蠢，并且可能是一种更好的方法。

代码循环遍历第一个文件夹和所有文件。之后，它再次循环子文件夹，然后再循环第三次。

有没有其他方法可以做到这一点？只需选择一个文件夹，然后它会自动向下循环层次结构。

static void ReadAllSubs(string siteUrl, string siteFolderPath, string localTempLocation)
        {
            ClientContext ctx = new ClientContext(siteUrl);
            ctx.AuthenticationMode = ClientAuthenticationMode.Default;
            SecureString passWord = new SecureString();
            string pwd = "xxx";
            foreach (char c in pwd.ToCharArray()) passWord.AppendChar(c);
            ctx.Credentials = new SharePointOnlineCredentials("[email protected]", passWord);
            FolderCollection folderCollection = ctx.Web.GetFolderByServerRelativeUrl("Delte%20dokumenter/07 - Detaljprosjekt").Folders;
            // Don't just load the folder collection, but the property on each folder too
            ctx.Load(folderCollection, fs => fs.Include(f => f.ListItemAllFields));
            // Actually fetch the data
            ctx.ExecuteQuery();



            foreach (Folder folder in folderCollection)
            {
                //LOOP MAIN FOLDER
                Console.WriteLine("---------------FIRST LAYER FOLDER---------------------");
                var item = folder.ListItemAllFields;
                var folderpath = item["FileRef"];
                FolderCollection LoopFolder = ctx.Web.GetFolderByServerRelativeUrl(folderpath.ToString()).Folders;
                ctx.Load(LoopFolder, fs => fs.Include(f => f.ListItemAllFields));
                ctx.ExecuteQuery();
                Console.WriteLine(folderpath);


                //LOOP ALL FILES IN FIRST MAIN FOLDER
                FileCollection mainfiles = ctx.Web.GetFolderByServerRelativeUrl(folderpath.ToString()).Files;
                ctx.Load(mainfiles);
                ctx.ExecuteQuery();
                Console.WriteLine("---------------FIRST LAYER FILES---------------------");
                foreach (File mainfile in mainfiles)
                    {
                        Console.WriteLine(mainfile.Name);
                        Console.WriteLine(mainfile.MajorVersion);
                    }

                //LOOP SUBFOLDER
                Console.WriteLine("---------------SECOUND LAYER FOLDER---------------------");
                foreach (Folder ff in LoopFolder)
                {

                    var subitem = ff.ListItemAllFields;
                    var folderpathsub = subitem["FileRef"];
                    Console.WriteLine(folderpathsub);

                    //LOOP ALL FILES IN FIRST SUBFOLDER
                    FileCollection files = ctx.Web.GetFolderByServerRelativeUrl(folderpathsub.ToString()).Files;
                    ctx.Load(files);
                    ctx.ExecuteQuery();
                    Console.WriteLine("---------------SECOUND LAYER FILES---------------------");
                    foreach (File file in files)
                    {
                        Console.WriteLine(file.Name);
                        Console.WriteLine(file.MajorVersion);
                    }
                    var created = (DateTime)item["Created"];
                    var modified = (DateTime)item["Modified"];



                    Console.WriteLine("---------------THIRD LAYER FOLDER---------------------");
                    FolderCollection ThirdLoopFolder = ctx.Web.GetFolderByServerRelativeUrl(folderpathsub.ToString()).Folders;
                    ctx.Load(ThirdLoopFolder, fs => fs.Include(f => f.ListItemAllFields));
                    ctx.ExecuteQuery();
                    foreach (Folder fff in ThirdLoopFolder)
                    {
                        var item3 = fff.ListItemAllFields;
                        var folderpath3 = item3["FileRef"];
                        Console.WriteLine(folderpath3);

                        //LOOP ALL FILES IN THIRD SUBFOLDER
                        FileCollection thirdfiles = ctx.Web.GetFolderByServerRelativeUrl(folderpath3.ToString()).Files;
                        ctx.Load(thirdfiles);
                        ctx.ExecuteQuery();
                        Console.WriteLine("---------------THIRD LAYER FILES---------------------");
                        foreach (File file in thirdfiles)
                        {
                            Console.WriteLine(file.Name);
                            Console.WriteLine(file.MajorVersion);
                        }

                    }
                }
            }
        }