Question

i have this c# code and i want to delete a certain sub directory in Documents Library. However this produces an error because the directory is not empty. I hope someone can guide me on how to do this.

thank you for any prompt reply.

StorageFolder storageFolder = KnownFolders.DocumentsLibrary;              
var queryResult = storageFolder.CreateFolderQuery();
IReadOnlyList<StorageFolder> folderList = await queryResult.GetFoldersAsync();

 foreach (StorageFolder folder in folderList)
    {
       await folder.DeleteAsync();             
    }

Answer 1

You could use the StorageFolder.GetFilesAsync() to obtain a list of all the files present in the folders and delete them prior to deleting the folders since there is no way in the DeleteAsync() method to specify subfolders and files.

More info: StorageFolder class | MSDN