BPASmartClient/DosingSystem/Service/ServerFactory.cs

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BPASmartClient.DosingSystem.Service
{
    public class ServerFactory
    {
        private volatile static ServerFactory _Instance;
        public static ServerFactory GetInstance => _Instance ?? (_Instance = new ServerFactory());
        private ServerFactory() { }

        ConcurrentDictionary<string, IAPIServer> servers = new ConcurrentDictionary<string, IAPIServer>();

        public void Set<T>(T server) where T : IAPIServer
        {
            string name = server.GetType().Name;
            if (!servers.ContainsKey(name))
            {
                servers.TryAdd(name, server);
            }
        }

        public IAPIServer Get()
        {
            if (servers.Count > 0)
                return servers.ElementAt(0).Value;
            return default;
        }

        public IAPIServer Get<TServer>(TServer server) where TServer : IAPIServer
        {
            var name = server.GetType().Name;
            if (servers.ContainsKey(name))
                return servers[name];
            return default;
        }

    }
}