摘要： 与CLR/BCL/C#里的概念进行联想对比，不难理解。using System;using System.Activities;using System.Activities.Expressions;using System.Activities.Statements;namespace ActivityDelegateAndInvoke{ public sealed class GetAndPlay<T> : Activity { public ActivityFunc<T> Get { get; set; } public ActivityAction<T&g 阅读全文