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Response Data

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HTTP Protocol

Web API is an API over the web which can be accessed using HTTP protocol, it is a concept and not a technology. We can build a Web API using .NET REST APIs that provide programmatic access to read and write data using which we can integrate our capabilities into our own application.
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HttpClient Gateway

The ASP.NET Web API framework includes a HttpClient to communicate with a Web API server. The HttpClient can be used in an ASP.Net MVC server side app, and it is like a webservice or WCF service but the exception is that it only supports HTTP protocol.

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