哪里可以获得.NET中套接字的keep-alive规范？

public static void EnableKeepAlive(Socket socket, int interval, int retryCount)
{
    byte[] keepAliveOptionValues = new byte[12];
    BitConverter.GetBytes(1).CopyTo(keepAliveOptionValues, 0); // 开启KeepAlive
    BitConverter.GetBytes(interval).CopyTo(keepAliveOptionValues, 4); // 心跳间隔时间
    BitConverter.GetBytes(retryCount).CopyTo(keepAliveOptionValues, 8); // 重试次数
    socket.IOControl(IOControlCode.KeepAliveValues, keepAliveOptionValues, null);
}

TcpClient tcpClient = new TcpClient();
tcpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, true);

HttpClientHandler httpClientHandler = new HttpClientHandler();
httpClientHandler.KeepAlivePingPolicy = HttpKeepAlivePingPolicy.Always;
HttpClient httpClient = new HttpClient(httpClientHandler);