public bool Ping(string host, int port)
{
var ping = new PingTest()
{
Address = $"{host}:{port}",
Date = DateTime.Now,
Success = TcpUtil.PingHost(host, port)
};
if (!Pings.ContainsKey(ping.Date))
{
Pings.Add(ping.Date, ping);
}
return(ping.Success);
}