This post provides a step-by-step guide on creating an Azure function in C# that sends a daily dog picture via WhatsApp using the Twilio API. The author assumes some base knowledge of C# and RESTful APIs, and outlines the necessary steps to create an Azure Function App, add dependencies, call a Dog API to retrieve a photo, and send the returned image to a phone number via the Twilio API for WhatsApp. The guide covers updating the Azure function's configuration file, adding environment variables for the Twilio Account SID and Auth Token, and creating a new method in the run.csx file that fetches an image from the Dog API and sends it using the Twilio API for WhatsApp.