dotnet-core/release-notes/2.1/Preview/api-diff/preview2/2.1-preview2_System.Net.Http.md

System.Net.Http

 namespace System.Net.Http {
+    public sealed class SocketsHttpHandler : HttpMessageHandler {
+        public SocketsHttpHandler();
+        public bool AllowAutoRedirect { get; set; }
+        public DecompressionMethods AutomaticDecompression { get; set; }
+        public TimeSpan ConnectTimeout { get; set; }
+        public CookieContainer CookieContainer { get; set; }
+        public ICredentials Credentials { get; set; }
+        public ICredentials DefaultProxyCredentials { get; set; }
+        public TimeSpan Expect100ContinueTimeout { get; set; }
+        public int MaxAutomaticRedirections { get; set; }
+        public int MaxConnectionsPerServer { get; set; }
+        public int MaxResponseDrainSize { get; set; }
+        public int MaxResponseHeadersLength { get; set; }
+        public TimeSpan PooledConnectionIdleTimeout { get; set; }
+        public TimeSpan PooledConnectionLifetime { get; set; }
+        public bool PreAuthenticate { get; set; }
+        public IDictionary<string, object> Properties { get; }
+        public IWebProxy Proxy { get; set; }
+        public TimeSpan ResponseDrainTimeout { get; set; }
+        public SslClientAuthenticationOptions SslOptions { get; set; }
+        public bool UseCookies { get; set; }
+        public bool UseProxy { get; set; }
+        protected override void Dispose(bool disposing);
+        protected internal override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken);
+    }
 }