Version 3.1.3 of the C# client was released on June 26, 2015 and is available for download here. It boasts the following new features and fixes:
Features
- Support new batch index protocol which allows multiple namespaces, bin name filters, and read types (read, exists) to be specified in a single batch call. This new functionality is supported by Aerospike Server versions >= 3.5.15 (which has not been released yet). The old batch direct protocol is still supported for compatibility with older servers.
 - Add Record.TimeToLive which converts server absolute time back to expiration ttl.
 - Implement Equals on every extended Value class.
 - Implement GetHashCode and Equals on Bin, Value and Filter.
 - Ignore sleepBetweenRetries when in async mode.
 - Change ClientPolicy.failIfNotConnected default to true.
 - Limit ClientPolicy.maxSocketIdle to 24 hours.
 
Fixes
- Check for null in ByteUtil.BytesToHexString().
 - Check for zero-sized arrays and call onSuccess() in async batch get.
 - AER-3648 - Handle duplicate node-ids caused by multiple ethernet interfaces.
 - Transfer timeout from command to future task.
 
Click here to view the release notes.