Could you survive Black Friday traffic loads, or will your app fall over if it goes viral. Do you know what your etags are doing right now? All of these are important questions and this sessions aims to answer at least some of them. We will go through how to get caching working for you and show you some real world examples. It will start small at conditional HTTP requests and build up to application caching using a layered distributed cache service driven by pub/sub. "There are only two hard things in Computer Science: cache invalidation and naming things. " - a famous saying. Let's make sure we're only left with one hard thing, naming the next .NET.