SignalR.EventStreamConnectionManager.AddConnection C# (CSharp) Method

        public void AddConnection(string clientId, string userId)
        {
            lock (locker) {
                if (!Users.ContainsKey(userId)) {
                    Users[userId] = new List<string>() { clientId };
                } else {
                    Users[userId].Add(clientId);
                }
            }
        }