Constructor Acknowledged NamespaceMongoDB.Driver AssemblyMongoDB.Driver.dll Acknowledged(long, long?, BsonValue) Initializes a new instance of the ReplaceOneResult.Acknowledged class. public Acknowledged(long matchedCount, long? modifiedCount, BsonValue upsertedId) Parameters matchedCount long The matched count. modifiedCount long? The modified count. upsertedId BsonValue The upserted id.