Fix a few for ListenerAsyncResult.cs
Refactored HttpListenerException.cs
Fix a few for HttpListenerException.cs
Fix a few for CookieException.cs
Fix a few for HttpListenerException.cs
Fix a few for WebSocketException.cs
Refactored HttpVersion.cs
Refactored EndPointManager.cs
Refactored ListenerPrefix.cs
Fix a few for AuthenticationSchemes.cs
Refactored HttpListenerPrefixCollection.cs