blocks|key|319754|text|契约就是接口--它定义了由WCF服务公开的服务操作，它可能与您的应用程序的未修饰代码接口1:1对应，也可能不对应。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|319755|该行为是该接口在主机上的实现--对于所有意图和目的，称为“服务”。|319756|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The Contract is the interface -- it defines the service operations exposed by the WCF service, which may or may not correspond 1:1 to an unadorned code interface your application.

The Behavior is an implementation of that interface on the host -- for all intents and purposes, "the service."

blocks|key|3279722|text|科尔笔记版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3279723|3279724|+Contract指定服务实际执行的操作。换句话说，什么端点操作是有效的。|unordered-list-item|offset|length|style|BOLD|3279725|+Endpoint指定了服务的实际运行实例。|3279726|服务行为定义了端点与客户端交互的方式。诸如安全性、并发性、缓存、日志记录等属性-这些都是behavior.|3279727|There的一部分也是操作行为，它类似于服务行为，但仅在运行特定操作时应用。|3279728|3279729|有关更多信息，我建议您从WCF+Architecture+Overview开始。|3279730|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa480210.aspx^0|0|0|1|8|0|1|8|0|0|4|0|B|4|0|0|C|P|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|11|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|12|8|@$F|13|G|14|H|I]]|9|@]|A|$]]|$1|J|3|K|5|E|7|15|8|@$F|16|G|17|H|I]]|9|@]|A|$]]|$1|L|3|M|5|E|7|18|8|@$F|19|G|1A|H|I]]|9|@]|A|$]]|$1|N|3|O|5|E|7|1B|8|@$F|1C|G|1D|H|I]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1F|8|@]|9|@$F|1G|G|1H|1|1I]]|A|$]]|$1|S|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

The Cole's Notes version:

<ul>
<li>The Contract specifies what the service actually does. In other words, what Operations are valid.</li>
<li>The Endpoint specifies an actual running instance of the service. It is the actual "service" in the sense that it executes, either as a Windows Service or under IIS.</li>
<li>The Service Behavior defines how the endpoint interacts with clients. Attributes like security, concurrency, caching, logging, etc. - those are all part of the behavior.</li>
<li>There is also an Operation Behavior which is similar to the Service Behavior but only gets applied when a specific operation is run.</li>
</ul>

For more information I suggest you start with the <a href="http://msdn.microsoft.com/en-us/library/aa480210.aspx" rel="noreferrer">WCF Architecture Overview</a>.

blocks|key|3066748|text|回答有点晚了，但是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3066749|3066750|，因为我目前正在努力解决两个|unordered-list-item|3066751|之间的差异，因为这是关于谷歌|3066752|的首批结果之一，并且因为当前的答案没有让我想到|3066753|3066754|以下是为我打开光芒的简明之处(cudo's+to+Fred+Yang)|3066755|ServiceContract|offset|length|style|BOLD|3066756|3066757|会影响客户端和服务器的行为，|3066758|既可以应用于接口，也可以应用于WSDL发出的|3066759|。|3066760|ServiceBehavior|3066761|3066762|仅影响服务器的行为仅适用于类|3066763|不影响WSDL|3066764|3066765|3066766|来自ServiceContract+vs+ServiceBehavior|3066767|3066768|中，ServiceContract属性影响客户端和服务器的行为，而ServiceBehavior只影响服务器的行为。ServiceContract既可以应用于接口，也可以应用于类，但ServiceBehavior只能应用于类实现。ServiceContract会影响发出的wsdl，但ServiceBehavior不会影响发出的wsdl。|blockquote|3066769|3066770|entityMap|0|LINK|mutability|MUTABLE|url|http://blog.semanticsworks.com/2009/03/servicecontract-vs-servicebehavior_1135.html^0|0|0|0|0|0|0|0|0|F|0|0|0|0|0|0|F|0|0|0|0|0|0|2|Y|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|1P|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|1Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|1R|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|1S|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|1T|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1U|8|@$O|1V|P|1W|Q|R]]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]|$1|T|3|U|5|E|7|1Y|8|@]|9|@]|A|$]]|$1|V|3|W|5|E|7|1Z|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|20|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|21|8|@$O|22|P|23|Q|R]]|9|@]|A|$]]|$1|11|3|-4|5|6|7|24|8|@]|9|@]|A|$]]|$1|12|3|13|5|E|7|25|8|@]|9|@]|A|$]]|$1|14|3|15|5|E|7|26|8|@]|9|@]|A|$]]|$1|16|3|-4|5|6|7|27|8|@]|9|@]|A|$]]|$1|17|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|29|8|@]|9|@$O|2A|P|2B|1|2C]]|A|$]]|$1|1A|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]|$1|1B|3|1C|5|1D|7|2E|8|@]|9|@]|A|$]]|$1|1E|3|-4|5|6|7|2F|8|@]|9|@]|A|$]]|$1|1F|3|-4|5|6|7|2G|8|@]|9|@]|A|$]]]|1G|$1H|$5|1I|1J|1K|A|$1L|1M]]]]

A bit late for an answer but 

<ul>
<li>as I'm currently struggling with the difference between the two </li>
<li>and as this is one of the first results on Google </li>
<li>and because the current answers did not give me that aha moment</li>
</ul>

following is in a nutshell what turned the light on for me (cudo's to Fred Yang)

ServiceContract

<ul>
<li>affects the behavior of both client and server</li>
<li>can apply to both interface and class</li>
<li>affects the WSDL emitted</li>
</ul>

ServiceBehavior

<ul>
<li>only affects the behavior of the server</li>
<li>only applicable to a class implementation</li>
<li>does not affect the WSDL</li>
</ul>

<hr>

From <a href="http://blog.semanticsworks.com/2009/03/servicecontract-vs-servicebehavior_1135.html">ServiceContract vs ServiceBehavior</a>

<blockquote>
 In WCF, ServiceContract attribute affect the behavior of both client
 and server, while ServiceBehavior only affect the behavior of server.
 ServiceContract can apply both to interface and class, but
 ServiceBehavior can only apply to class implementation.
 ServiceContract affect the wsdl emitted, but ServiceBehavior will not
 affect wsdl emitted.
</blockquote>

blocks|key|316875|text|合同是客户和服务提供商之间的合同。它告诉我们将会暴露哪些数据。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|316876|服务行为是服务的行为，它告诉服务在客户端将访问服务时服务将如何行为。让我们假设如果多个客户端正在访问服务，那么它是否能够处理请求，如何处理多个请求，如何处理多个请求。这些事情是由服务的行为来处理的。|316877|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Contract is contract between client and service provider. It tells what data will be exposed.

Service behavior is behavior of service which tells how service will behave when client will hit the service. Lets suppose if multiple clients are hitting service then whether it is able to handle to request or not, how to handle multiple request, what to do to handle multiple request. These things are handle by behavior of service.

In WCF, what is the difference between a Behaviour and a Contract? From examining the config file, both seem to point to the interface of the service functionality. Why are they both needed?

WCF - difference between a behaviour and a contract?

服务器

在WCF中，Behaviour和Contract之间的区别是什么？通过检查配置文件，两者似乎都指向服务功能的接口。为什么两者都需要？

问WCF -行为和合同之间的区别？
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