Using multiple MongoClient c#

I’m currently learning and the way I connect to the database is by using one client for each collection.
now I have 7 collections which is 7 MongoClients, should I change my code to use one client only ?

Reuse Your Client

Because each MongoClient represents a pool of connections to the database, most applications require only a single instance of MongoClient, even across multiple requests

From https://www.mongodb.com/docs/drivers/csharp/current/fundamentals/connection/connect/