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Showing content from https://learn.microsoft.com/en-us/dotnet/api/system.net.http.socketshttphandler below:

SocketsHttpHandler Class (System.Net.Http) | Microsoft Learn

SocketsHttpHandler Class Definition

Provides the default message handler used by HttpClient in .NET Core 2.1 and later.

public ref class SocketsHttpHandler sealed : System::Net::Http::HttpMessageHandler

[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public sealed class SocketsHttpHandler : System.Net.Http.HttpMessageHandler

public sealed class SocketsHttpHandler : System.Net.Http.HttpMessageHandler

[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
type SocketsHttpHandler = class
    inherit HttpMessageHandler

type SocketsHttpHandler = class
    inherit HttpMessageHandler

Public NotInheritable Class SocketsHttpHandler
Inherits HttpMessageHandler

Inheritance

Attributes

Starting with .NET Core 2.1, the SocketsHttpHandler class provides the implementation used by higher-level HTTP networking classes such as HttpClient. The use of SocketsHttpHandler offers a number of advantages:

A significant performance improvement when compared with the previous implementation.
The elimination of platform dependencies, which simplifies deployment and servicing. For example, libcurl is no longer a dependency on .NET Core for macOS and .NET Core for Linux.
Consistent behavior across all .NET platforms.

If this change is undesirable and you are on .NET Core 2.1-3.1, you can configure your application to use the older System.Net.Http.HttpClientHandler class instead in a number of ways:

By calling the AppContext.SetSwitch method as follows:

AppContext.SetSwitch("System.Net.Http.UseSocketsHttpHandler", false);

AppContext.SetSwitch("System.Net.Http.UseSocketsHttpHandler", False)

By defining the System.Net.Http.UseSocketsHttpHandler switch in the .netcore.runtimeconfig.json configuration file:
```
"runtimeOptions": {
  "configProperties": {
      "System.Net.Http.UseSocketsHttpHandler": false
  }
}
```
By defining an environment variable named DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER and setting it to either false or 0.

These configuration options are not available starting with .NET 5.

Constructors Properties Methods

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