The Twilio for .NET Developers Part 7: SMS & Voice Application Flows using ASP.NET MVC post provides a comprehensive guide on how to create complex call flows using ASP.NET MVC, leveraging the Twilio REST API and TwiML. The post covers setting up an ASP.NET MVC application, configuring Twilio numbers, creating a basic IVR system with a multi-step voice call workflow, adding menu options, processing user input, and handling submenu redirects. The article is written by Devin Rader, a Twilio developer evangelist, and provides detailed code examples and explanations to help .NET developers build their own interactive voice response systems using ASP.NET MVC and Twilio.