/// <summary>
/// 连线时调用
/// </summary>
/// <returns></returns>
public override Task OnConnected()
{
Console.WriteLine("客户端连接，连接ID是:{0},当前在线人数为{1}", Context.ConnectionId, OnlineUsers.Count + 1);
IOHelper.WriteLog(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + string.Format("Client On line，ID:{0},Total On Line {1}", Context.ConnectionId, OnlineUsers.Count + 1));
return(base.OnConnected());
}