net40-client 
namespace System.Net.Http
{
    public static class HttpClientHandlerExtensions : ?
    {
        public static bool SupportsProtocolVersion(this HttpClientHandler handler);
    }
}
.NET
6.07.08.09.0
.NET Framework
4.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net40-client
Assembly

System.Net.Http.Extensions , Version=2.2.29.0, PublicKeyToken=b03f5f7f11d50a3a

Referencing

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

Package Microsoft.Net.Http (2.2.29) net40
Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API