In this article, the author discusses health checks in .NET applications and introduces an open source Ably.Healthcheck library that provides various health check options for services like SQL Databases, MongoDB, ElasticSearch, and more. The three available health checks are PingHealthCheck, ChannelHealthCheck, and TimerHealthCheck, each with different levels of thoroughness in checking the service's health. The author also demonstrates how to configure these health checks in a .NET WebApp using the Ably.Healthcheck library and provides useful resources for further reading on developing dependable realtime apps with .NET.