/// <summary>
/// Deletes a given file from the file system.
/// </summary>
/// <param name="virtualFilePath">The qualified path of the file to be created.</param>
/// <exception cref="ArgumentNullException">If <paramref name="virtualFilePath"/>
/// is a null reference.</exception>
/// <exception cref="ResourceAccessException">In case of invalid or prohibited
/// resource access.</exception>
/// <exception cref="VirtualResourceNotFoundException">If the
/// file does not exist.</exception>
public override void DeleteFile(string virtualFilePath)
{
SecureAction(FileSystemTask.FileDeleteRequest,
() => OperationService.DeleteFile(virtualFilePath),
() => String.Format("Could not delete file [{0}] from file system.", virtualFilePath));
}