This tutorial guides you on how to automate important phone calls using Twilio Voice and C#. To start, you need to set up your project environment by creating a new .NET project, installing the Twilio CLI, and configuring your IDE. You then replace the default code with a sample program that makes an automated voice call from Twilio. The code uses TwiML to play a message to the recipient's phone number. To schedule the task to run at a specific time, you can use Task Scheduler on Windows or Automator on Mac. Once set up, you can test your application by running it in debug mode and scheduling the task for a later date. The tutorial concludes with suggestions for further improvements, such as hiding phone numbers and experimenting with TwiML.