Microsoft .NET is approaching its ten-year birthday party. A lot has happened in the past decade—.NET 4.5 marks the occasion with many new features and scenarios. While the most exciting of these is support for new features in Windows, we spend the time revealing other elements. Come see some of the library improvements made based on direct customer requests. Learn about the range of new performance features that support everything from small client applications to massively scalable server solutions. Also, learn about async, multi-core JIT, and background garbage collection.