Release notes for 2.4.0.

Author: rstam

Release Notes/Release Notes v2.4.0.md

@@ -1,7 +1,33 @@
-# .NET Driver Version 2.4.0-beta1 (PRE-RELEASE)
+# .NET Driver Version 2.4.0
 
-This is a beta release of the upcoming 2.4.0 version of the driver.
+The main new feature of 2.4.0 is support for the new features of the 3.4 version of the server:
 
-The main new feature of 2.4.0 is support for the new features of the 3.4.0 version of the server.
+* New Decimal128 data type
+* New convention for automapping immutable classes for serialization
+* New IAggregateFluent methods
+  * Bucket and BucketAuto
+  * Count
+  * Facet
+  * GraphLookup
+  * ReplaceRoot
+  * SortByCount
+* New PipelineDefinitionBuilder for building pipelines for CreateView and Facet
+* New MaxStaleness property for ReadPreference
+* Configurable HeartbeatInterval
+* Support for collations
+* Driver identifies itself to the server when connecting
+* Support for creating read-only views
+* Commands that write now support WriteConcern
+* LINQ supports new methods: Aggregate, Reverse, Zip
 
+An online version of these release notes is available at:
 
+https://github.com/mongodb/mongo-csharp-driver/blob/master/Release%20Notes/Release%20Notes%20v2.4.0.md
+
+The JIRA tickets resolved in this release is available at:
+
+https://jira.mongodb.org/issues/?jql=project%20%3D%20CSHARP%20AND%20fixVersion%20%3D%202.4%20ORDER%20BY%20key%20ASC
+
+Upgrading
+
+We believe there are only minor breaking changes in classes that normally would not be directly used by applications.