AthWebClient is another Http client library for .NET. It intended for using instead of HttpWebRequest or WebClient classes. Main difference from HttpWebRequest: no magic, until requested. By default, AthWebClient will make only requested actions. And nothing more.

• KeepAlive is on by default. As result, if you perform only single request, .NET will bring up lot of machinery and will take connection to remote server
• By default, only 2 connections to server allowed (with hidden internal queue)
• Very dumb inner queue with bad balancing
• Unusable timeouts: timeout for all request sound good, but there are differences for 100 sec for downloading 1000 bytes or 10 Gbytes
• Enabled WriteBuffering is on by default (it seems, without chunking, it will be anyway, but can be fixed)
• Min Chunk Size is 1024 byte. It impossible to send smaller data
• Server Certificate validation callback through static ServicePointManager
• Bad options for Ssl configuration
• Any 'error' response from server causes exception. E.g. 404 with a lot of useful data
• Own Dns-caching
• Expect-100-continue with unpredictable results (e.g. 350ms latency for posts)
• Problem with multiple headers with same name (e.g. Set-Cookie)
• Inability to set lot of headers directly, only through specific properties
• Inability to send body data with GET (yes, it sounds and looks strange, but why not?)
• Server redirect support by default is on

Due this situation, I decide to realize own dumb Http Client with simple, but configurable interface without additional magic by default.

• Chunking support for request/response
• HTTPS support with security configuration and connection information
• Support of automatic decompression of GZip/Defalte response (if requested)
• Timeouts for Connect, Send, Receive
• Limit request number to server

• KeepAlive suport
• Proxy support (with autentication)
• Authentication support
• Timeouts configuration (better support)
• Request cancelling (better support)
• Api improvements (better support of standard headers)
• Automatic Redirects
• Expect 100 Continue
• AthWebClient (analog of WebClient with simple methods)
• .NET 4.5 Async/Await full support