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This article mainly explains "what are the communication methods of WCF services". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what are the communication methods of WCF services"?

When learning WCF, you may encounter that WCF does not allow the client to interact with the service directly, even if it invokes the service problem in the local machine memory. Here we will introduce the solution to the WCF service communication problem. The client always uses the Proxy to forward the call to the service. The operation exposed by the agent is the same as that of the service, while adding some ways to manage the agent.

The creation of services is opaque to the outside world, so WCF services usually describe the available functions and the ways in which services may communicate by exposing metadata (Metadata). The publication of metadata can be defined in advance and is independent of specific technologies (Technology-Neutral), such as WSDL based on HTTP-GET, or conforming to industry standards for metadata exchange. A non-WCF client can import metadata into the local environment as a local type. Similarly, WCF clients can import metadata from non-WCF services and then invoke it in the form of local CLR classes and interfaces.

WCF allows clients to communicate with WCF services across execution boundaries. In the same machine, clients can invoke services in the same application domain, cross-application domain calls, or even cross-process calls in the same process.

Figure: using machines to implement WCF service communication

The diagram shows how to communicate across machine boundaries, where clients can interact with services across Intranet or Internet boundaries.

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