net8.0-windows 
namespace Microsoft.Extensions.DependencyInjection
{
    public static class HttpClientBuilderExtensions
    {
        [UnsupportedOSPlatform("browser")]
        public static IHttpClientBuilder! UseSocketsHttpHandler(this IHttpClientBuilder! builder, Action<ISocketsHttpHandlerBuilder!>! configureBuilder);
    }
}
.NET
8.09.010.011.0
Information specific to net8.0
Assembly

Microsoft.Extensions.Http , Version=10.0.0.0, PublicKeyToken=adb9793829ddae60

Referencing

Your project needs a package reference to Microsoft.Extensions.Http.

Package Microsoft.Extensions.Http (10.0.13) net8.0
Platform Restrictions

This API is supported on any platform except for these:

  • Browser
  • Built-in API
  • Package-provided API