namespace System.Activities.Presentation {
 
    using System;
 
    /// <summary>
    /// A delegate that is called back when an object should publish an instance of a
    /// service.
    /// </summary>
    /// <param name="serviceType">The type of service to be published.</param>
    /// <returns>An instance of serviceType.</returns>
    public delegate object PublishServiceCallback(Type serviceType);
 
    /// <summary>
    /// A generic delegate that is called back when an object should publish an 
    /// instance of a service.
    /// </summary>
    /// <typeparam name="TServiceType">The type of service to be published.</typeparam>
    /// <returns>An instance of TServiceType.</returns>
    public delegate TServiceType PublishServiceCallback<TServiceType>();
}