Core logic ported from TS: HttpClientFactory, Environment and WebSocketHandler.

Core/HttpClientFactory.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Net.Http;
+
+namespace Chtn.CSharp.SDK.Core
+{
+    public static  class HttpClientFactory
+    {
+        public static HttpClient CreateClient(bool isCdn = false)
+        {
+            var env = EnvironmentConfig.Get();
+            return new HttpClient
+            {
+                BaseAddress = new Uri(isCdn ? env.CdnUrl : env.ApiUrl),
+                Timeout = TimeSpan.FromSeconds(5)
+            };
+
+        }
+    }
+}