NativeX (formerly W3i) recently transitioned a large portion of their backend infrastructure from Microsoft SQL Server to Apache Cassandra. Today, its Cassandra cluster backs its mobile advertising network supporting over 10 million daily active users that produce over 10,000 transactions per second with an average database request latency of under 2 milliseconds. Come hear our story about how we were successful at getting our .NET web apps to reliably connect to Cassandra. Come learn about FluentCassandra, Snowflake, Hector, and IKVM. It's a story of struggle and perseverance, where everyone lives happily ever after.