Exception while recursively deleting files and folders in WP8

Question

I am trying to delete a folder from Isolated Storage which has files and folders inside recursively. I am using a piece of code suggested by others on Stackoverflow and other blogs. The code is as follows:

private void deleteSubApp(string pappname)
  {
      try
      {
          string directory = "apps/" + pappname;
          IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication();
          if (iso.DirectoryExists(directory))
          {
              string[] files = iso.GetFileNames(directory + @"/*");
              foreach (string file in files)
              {
                  try
                  {
                      iso.DeleteFile(directory + @"/" + file);
                  }

              }

              string[] subDirectories = iso.GetDirectoryNames(directory + @"/*");
              foreach (string subDirectory in subDirectories)
              {
                  try
                  {
                      deleteSubApp(directory + @"/" + subDirectory);
                  }

              }

              iso.DeleteDirectory(directory);

          }
      }
  }

Since Windows Phone 8 does not allow a built in function to delete a folder unless its empty, deleting it recursively as the above code remains the only option. But when i run the code, i get an exception which is:

System.IO.IsolatedStorage.IsolatedStorageException: Unable to delete, directory not empty or does not exist.

Please help to find any errors in the code, due to which it is failing? Or am I missing something?

Answer 1

Change

deleteSubApp(directory + @"/" + subDirectory);

To

deleteSubApp(pappname + @"/" + subDirectory);

Otherwise you pass in something like "apps/pappname/subdirectory" on the recursive call and it will set directory to "apps/apps/pappname/subdirectory" which does not exist.