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MongoCollectionCount Method (IMongoQuery)
Counts the number of documents in this collection that match a query.

Namespace: MongoDB.Driver
Assembly: MongoDB.Driver.Legacy (in MongoDB.Driver.Legacy.dll) Version: 2.2.0
Syntax
public virtual long Count(
	IMongoQuery query
)

Parameters

query
Type: MongoDB.DriverIMongoQuery
The query (usually a QueryDocument or constructed using the Query builder).

Return Value

Type: Int64
The number of documents in this collection that match the query.
See Also