According to the docs, MongoServer.GetDatabase should return the same instance when the same database settings (e.g. database name) are used. However, the following test fails:

void describe_get_database()
{
MongoServer server = null;
MongoDatabase db = null;
MongoDatabase db2 = null;
string dbName = null;

before = () =>

{ var client = new MongoClient("mongodb://localhost"); server = client.GetServer(); dbName = "test"; db = server.GetDatabase(dbName); }

;

act = () => db2 = server.GetDatabase(dbName);

context["when the database name is the same"] = () =>

{ it["should return the same database instance"] = () => db2.should_be_same(db); }

;
}

Have I misunderstood the documentation as looking through the source code it appears that GetDatabase always returns a new MongoDatabase instance.