Remotely/Shared/ViewModels/ChatSession.cs

using Nihs.ConcurrentList;
using System;

namespace Remotely.Shared.ViewModels
{
    public class ChatSession
    {
        public ConcurrentList<ChatHistoryItem> ChatHistory { get; } = new();
        public string DeviceId { get; set; }
        public string DeviceName { get; set; }
        public string ExpandedClass => IsExpanded ? "expanded" : "";
        public bool IsExpanded { get; set; }

        public int MissedChats { get; set; }
        public string SessionId { get; } = Guid.NewGuid().ToString();
    }
}