Wrote 1.4.2 release notes.

Author: Robert Stam

Release Notes/Release Notes v1.4.2.md

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+C# Driver Version 1.4.2 Release Notes
+=====================================
+
+This minor release fixes a few issues found in the 1.4.1 release.
+
+File by file change logs are available at:
+
+https://github.com/mongodb/mongo-csharp-driver/blob/master/Release%20Notes/Change%20Log%20v1.4.2-Bson.txt
+https://github.com/mongodb/mongo-csharp-driver/blob/master/Release%20Notes/Change%20Log%20v1.4.2-Driver.txt
+
+These release notes describe the changes at a higher level, and omit describing
+some of the minor changes.
+
+Breaking changes
+----------------
+
+After 1.4.1 was released it was discovered that there were some minor breaking
+changes. The breaking changes were in methods that we considered to be internal,
+but that were not made private so that they leaked out into the public API.
+Those methods have now been marked obsolete and will be made private in 
+a future release. The 1.4.2 release restores backward compatibility for these
+methods (GetDocumentId and SetDocumentId in BsonDocument).
+
+JIRA issues resolved
+--------------------
+
+The full list of JIRA issues resolved in this release is available at:
+
+https://jira.mongodb.org/secure/IssueNavigator.jspa?mode=hide&requestId=11409
+
+BSON library changes
+====================
+
+GetDocumentId/SetDocumentId marked obsolete
+-------------------------------------------
+
+These methods were intended to be private. They have been marked as obsolete
+and will be made private in a future release.
+
+Driver changes
+==============
+
+Query.All/In/NotIn
+------------------
+
+There was an issue with Query.All/In/NotIn that might have affected you. If you
+cast a BsonArray to IEnumerable<BsonValue> before calling Query.All/In/NotIn
+you would get an exception. This only happened when casting a BsonArray to
+IEnumerable<BsonValue>. If you passed a BsonArray to the BsonArray overload or
+passed an IEnumerable<BsonValue> that was not a BsonArray to the
+IEnumerable<BsonValue> overload no exception was thrown.
+
+RequestStart/RequestDone
+------------------------
+
+Calling RequestStart when the connection pool was oversubscribed would often
+result in a deadlock. This has been fixed in the 1.4.2 release.
+
+Ping/VerifyState
+----------------
+
+These methods are usually called from a timer to monitor the state of the
+server (or of multiple servers if connected to a replica set), but you can
+also call them yourself. These methods now use a new connection instead
+of one from the connection pool so that they are not delayed waiting for a
+connection when the connection pool is oversubscribed.