Описание тега dotnet-httpclient
Refers to the System.Net.Http.HttpClient library which is part of the HttpClient package on NuGet, or the .NET 4.5 library.
System.Net.Http.HttpClient is a general purpose HTTP client library, intended for use in REST applications or basic HTTP applications. It includes support for de-serializing responses in JSON and XML.
HttpClient was first released in 2008/9 as part of the WCF Starter Kit, which was released via Codeplex.
That HTTP Client library then graduated to a standalone package available via NuGet.
HttpClient will be subsumed into.NET with v4.5, retaining the fullname, namespace, and API, but changing the strong name.
This tag refers to all versions of that.NET library; It specifically excludes the similarly-named Java HttpClient library.
See also httpclientfactory for proper HttpClient lifecycle management and creating typed clients.