/// <summary>
/// Gets all child folders of a given folder.
/// </summary>
/// <param name="parentFolderPath">The <see cref="VirtualResourceInfo.FullName"/>, which
/// identifies the parent folder within the file system.</param>
/// <returns>The child folders of the folder.</returns>
/// <exception cref="ArgumentNullException">If <paramref name="parentFolderPath"/>
/// is a null reference.</exception>
/// <exception cref="VirtualResourceNotFoundException">If the folder that is represented
/// by <paramref name="parentFolderPath"/> does not exist in the file system.</exception>
/// <exception cref="ResourceAccessException">In case of invalid or prohibited
/// resource access.</exception>
public override IEnumerable <VirtualFolderInfo> GetChildFolders(string parentFolderPath)
{
return(SecureFunc(FileSystemTask.ChildFoldersRequest, () => OperationService.GetChildFolders(parentFolderPath),
() => String.Format("Could not get child folders of folder [{0}].", parentFolderPath)));
}