/// <summary>
 /// Creates a qualified name that can be used as an identifier
 /// for a given file of the file system.
 /// </summary>
 /// <param name="parentFolder">The qualified name of the parent
 /// folder.</param>
 /// <param name="fileName">The name of a file within the folder.</param>
 /// <returns>An qualified path name for the submitted
 /// <paramref name="fileName"/>.</returns>
 public override string CreateFilePath(string parentFolder, string fileName)
 {
     return(SecureFunc(FileSystemTask.CreateFilePathRequest,
                       () => OperationService.CreateFilePath(parentFolder, fileName),
                       () =>
                       String.Format("Could not get a file path for parent folder [{0}] and file name [{1}].",
                                     parentFolder, fileName)));
 }