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IMongoCollectionTDocumentEstimatedDocumentCount Method

Returns an estimate of the number of documents in the collection.

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.17.0+b316340e6cc3a8bfc8638dc31b54fbbfe41bfcb2
long EstimatedDocumentCount(
	EstimatedDocumentCountOptions options = null,
	CancellationToken cancellationToken = default


options (Optional)
Type: MongoDB.DriverEstimatedDocumentCountOptions
The options.
cancellationToken (Optional)
Type: System.ThreadingCancellationToken
The cancellation token.

Return Value

Type: Int64
An estimate of the number of documents in the collection.
Due to an oversight in versions 5.0.0-5.0.8 of MongoDB, the count command, which estimatedDocumentCount uses in its implementation, was not included in v1 of the Stable API. If you are using the Stable API with estimatedDocumentCount, you must upgrade to server version 5.0.9+ or set strict: false when configuring ServerApi to avoid encountering errors.
See Also