Many applications start as single-tenant systems — built for one customer, one database, and one set of assumptions. But what happens when the business needs to scale to multiple customers without rewriting everything?

In this session, we’ll walk through the practical challenges of converting a single-tenant .NET application into a multi-tenant system. We’ll explore database strategies (shared vs isolated), tenant resolution patterns, authentication implications, performance considerations, and the subtle assumptions that break during migration. Rather than presenting a theoretical ideal architecture, this talk focuses on real-world tradeoffs, pitfalls, and lessons learned when evolving an existing system.

Attendees will leave with a practical framework for evaluating and implementing multi-tenancy in their own applications.