Maintaining an instance of an object in a hub class for signalR
===

I currently have the following code for my hub class:

    public class MatchMaker : Hub
        {    

   
        private List<SoloUser> soloUsers = new List<SoloUser>();

        //Client Requests
        public void findNewPartner(string Country, string State)
        {
            SoloUser soloUser = soloUsers.FirstOrDefault(s => (s.Country== Country) && (s.State == State));
            if (soloUsers.Count > 0)
                Clients.partnerRequestResult(soloUsers.FirstOrDefault());
            else
            {
                soloUser = new SoloUser { 
                    Major = Major,
                    School = School,
                    SessionId = SessionId,
                    Token = token
                };
                soloUsers.Add(soloUser);
            }
           
            
            
        }
    }

The problem is whenever I call this method on the client side, adding a SoloUser object to my `soloUsers` collection does not save, so when another user calls this function again, the linq statement(`soloUsers.FirstOrDefault(s => (s.School == School) && (s.Major == Major))`) never finds a SoloUser.  How can I make it so my `soloUsers` collection will save the instance and the objects added to it?