//Router  1
PingReply pingresult1 = ping.Send(textBoxRouter1.Text, timeout, buffer, options);
if (pingresult1.Status.ToString() == "Success")
{
    pictureBoxRouter1.Image = Properties.Resources.router_online;
    toolTip0.SetToolTip(pictureBoxRouter1, "Ethernet: " + textBoxRouter1.Text + " | UP" + Environment.NewLine + "Serial 0: " + "192.168." + textBoxSerialAB.Text + ".2" + " | UP" + Environment.NewLine + "Ethernet: " + textBoxRouter1.Text + " | UP" + Environment.NewLine + "Serial 1: " + "192.168." + textBoxSerialBC.Text + ".1" + " | UP");

    richTextBoxOutput.Text += "-------------------------------------------";
    richTextBoxOutput.Text += Environment.NewLine + "ROUTER - B";
    richTextBoxOutput.Text += Environment.NewLine;
    richTextBoxOutput.Text += Environment.NewLine + "Ethernet: " + pingresult1.Address.ToString();
    richTextBoxOutput.Text += Environment.NewLine + "Serial 0: " + "192.168." + textBoxSerialAB.Text + ".2";
    richTextBoxOutput.Text += Environment.NewLine + "Serial 1: " + "192.168." + textBoxSerialBC.Text + ".1";
    richTextBoxOutput.Text += Environment.NewLine;
    richTextBoxOutput.Text += Environment.NewLine + "Response time: " + pingresult1.RoundtripTime + "ms";
    richTextBoxOutput.Text += Environment.NewLine + "Time to live: " + pingresult1.Options.Ttl;
    richTextBoxOutput.Text += Environment.NewLine + "Don't fragment: " + pingresult1.Options.DontFragment;
    richTextBoxOutput.Text += Environment.NewLine + "Buffer size: " + pingresult1.Buffer.Length;
    richTextBoxOutput.Text += Environment.NewLine + "-------------------------------------------";
}
else
{
    pictureBoxRouter1.Image = Properties.Resources.router_offline;
    toolTip0.SetToolTip(pictureBoxRouter1, "Ethernet: " + textBoxRouter1.Text + " | DOWN");

    PingReply pingresultS1 = ping.Send("192.168." + textBoxSerialAB.Text + ".2");
    if (pingresultS1.Status.ToString() == "Success")
    {
        toolTip0.SetToolTip(pictureBoxRouter1, "Ethernet: " + textBoxRouter1.Text + " | DOWN" + Environment.NewLine + "Serial 0: " + "192.168." + textBoxSerialAB.Text + ".2" + " | UP");
    }
    else
    {
        toolTip0.SetToolTip(pictureBoxRouter1, "Ethernet: " + textBoxRouter1.Text + " | DOWN" + Environment.NewLine + "Serial 0: " + "192.168." + textBoxSerialAB.Text + ".2" + " | DOWN");
    }

    PingReply pingresultS11 = ping.Send("192.168." + textBoxSerialBC.Text + ".1");
    if (pingresultS11.Status.ToString() == "Success")
    {
        toolTip0.SetToolTip(pictureBoxRouter1, "Ethernet: " + textBoxRouter1.Text + " | DOWN" + Environment.NewLine + "Serial 0: " + "192.168." + textBoxSerialAB.Text + ".2" + " | UP" + Environment.NewLine + "Serial 1: " + "192.168." + textBoxSerialBC.Text + ".1" + " | UP");
    }
    else
    {
        toolTip0.SetToolTip(pictureBoxRouter1, "Ethernet: " + textBoxRouter1.Text + " | DOWN" + Environment.NewLine + "Serial 0: " + "192.168." + textBoxSerialAB.Text + ".2" + " | DOWN" + Environment.NewLine + "Serial 1: " + "192.168." + textBoxSerialBC.Text + ".1" + " | DOWN");
    }
}