Twilio for .NET Developers Part 5: Twilio Client, MVC and WebMatrix Helper Libraries` simplifies the use of the Twilio REST API for .NET developers with a set of utilities that make it easy to work with TwiML and Twilio Client. The `Twilio.Client` library makes it simple to add VoIP functionality to web, iOS, and Android apps, while the `MVC Helper` library provides classes useful for ASP.NET MVC developers, such as generating TwiML content from controllers. The `WebMatrix Helper` library offers methods for sending SMS messages or initiating outbound calls in the new WebMatrix development environment. These helper libraries help .NET developers integrate Twilio into their applications and create multi-step flows for conversations.