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DOCSP-46065: GUID serialization breaking change note #439

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Jan 27, 2025
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DOCSP-46065: GUID serialization breaking change note #439

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DOCSP-46065: GUID serialization breaking change note
mcmorisi Jan 24, 2025
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mcmorisi Jan 27, 2025
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10 changes: 10 additions & 0 deletions source/upgrade/v3.txt
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Expand Up @@ -248,3 +248,13 @@ Version 3.0 Breaking Changes
- The driver seals the ``MongoClient``, ``MongoDatabase``, and ``MongoCollection`` classes.
We recommend using the ``IMongoClient``, ``IMongoDatabase``, and ``IMongoCollection``
interfaces directly.

- The driver requires applications to explicitly configure how to serialize GUIDs
by using the ``GuidSerializer`` and ``ObjectSerializer`` classes. {+driver-short+}
users building new applications can implement a global ``GuidSerializer`` by registering
it. We recommend that users with older applications verify that all ``GUIDs`` are
serialized the same way when implementing a global ``GuidSerializer``. You can also
configure ``GUID`` serialization on a case-by-case basis without registering a global
``GuidSerializer``.

To learn more about GUID serialization, see the :ref:`csharp-guids` guide.
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