using System.Collections.Concurrent; namespace AsbCloudWebApi.SignalR.ConnectionManager; public class ConnectionManager : IConnectionManager { private readonly ConcurrentDictionary _connections = new(); public void AddConnection(string userId, string connectionId) { _connections.TryAdd(userId, connectionId); } public void RemoveConnection(string userId) { _connections.TryRemove(userId, out _); } public string? GetConnectionIdByUserId(string userId) { _connections.TryGetValue(userId, out string? connectionId); return connectionId; } }