NEST 2.0, the .NET client for Elasticsearch, has been released with significant updates and improvements since version 1.7.1, incorporating over 1000 commits. The developers restructured the internal architecture, replacing the Task Parallel Library with async/await for more efficient exception handling and providing an extensive audit trail. The test framework has been overhauled to streamline testing through a single project that supports both unit and integration tests, along with a Virtual Cluster for simulating various client scenarios. Exception handling has been simplified to three main types, enhancing user understanding of error origins. NEST 2.0 introduces numerous breaking changes, aligning with Elasticsearch 2.0's features, such as merging query and filter constructs and refining attribute-based mapping for cleaner API usage. The update also embraces new features from C# 6 and provides compatibility with DNX through a new dotnet5.1 version, while actively preparing for future .NET developments.