The Couchbase .NET SDK version 2.2.7 is now available, featuring the Developer Preview of Index Management, which allows for easy creation and management of primary and secondary indexes using the BucketManager class. This release includes improvements to the Sub-Document API, such as performance enhancements and support for async operations on sub-documents. Additionally, the SDK has been updated with bug fixes and new features, including extended support for Index Management and improved error handling.