IManageUnitsOfWork.cs

  /// Interface used by NServiceBus to manage units of work as a part of the
  ///             message processing pipeline.
  /// </summary>
  public interface IManageUnitsOfWork
  {
    /// <summary>
    /// Called before all message handlers and modules
    /// </summary>
    void Begin();

    /// <summary>
    /// Called after all message handlers and modules, if an error has occurred the exception will be passed
    /// </summary>
    void End(Exception ex = null);
  }