As of MapR 6.0.1/MEP5.0, you can create C#/.NET applications for HPE Ezmeral Data Fabric Event Store using the HPE Ezmeral Data Fabric Event Store C#/.NET client. The HPE Ezmeral Data Fabric Event Store C#/.NET client is a binding for librdkafka and the HPE Ezmeral Data Fabric Event Store C Client is a distribution of librdkafka that works with HPE Ezmeral Data Fabric Event Store.
See Installing HPE Ezmeral Data Fabric Event Store C#/.NET Client for installation information.