Can I enable CSFLE automatic encryption for only one collection in C#?

Working with Data
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1

I’m setting up Client-Side Field Level Encryption (CSFLE) with automatic encryption in C#.

In our case, the Users collection should have certain fields (like Name and Email) encrypted. This works fine using schema validation with automatic encryption.

The issue is that when automatic encryption is enabled on the MongoClient, we run into the limitations of Unsupported Operations for Automatic Encryption — even on collections that don’t require encryption.

Question:
Is it possible to enable automatic encryption only for a specific collection (e.g., Users) while still using a single MongoClient instance?

2

I think that would be a bug, but maybe the “unencrypted” collection has a schema map on it that has been forgotten? Can you run db.getCollectionInfos({ name:"collection_name"}) to see? You should be able to run commands without limitation if the collection doesn’t have an encryption schema…