Redis StackExchange All Keys from Cluster


I have 3 Servers on Redis Cluster with 3 Master/3 Slave nodes. I am pushing some keys which are then distributed to these servers but when I want to get the Keys I am only getting key from one server. What I would like to do is Get all keys from all nodes that matches a specific pattern. I am using StackExchange.Redis and following is what I use to get those keys

Preformatted textserver.Keys(0, searchKey).Select(x => (string)x);

the SearchKey is the Pattern.