From 489f97fe705b17fa0d370102563cbb7ded2ede69 Mon Sep 17 00:00:00 2001
From: Michele Cattafesta <michele.cattafesta@mesta-automation.com>
Date: Fri, 2 Oct 2015 18:35:27 +0200
Subject: [PATCH] IsAvailable disposes Ping properly (Issue #32).

Signed-off-by: Michele Cattafesta <michele.cattafesta@mesta-automation.com>
---
 S7.Net/PLC.cs | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/S7.Net/PLC.cs b/S7.Net/PLC.cs
index f9715cc..2a29fc3 100644
--- a/S7.Net/PLC.cs
+++ b/S7.Net/PLC.cs
@@ -26,9 +26,19 @@ namespace S7.Net
         {
             get
             {
-                Ping ping = new Ping();
-                PingReply result = ping.Send(IP);
-                return result != null && result.Status == IPStatus.Success;
+                using (Ping ping = new Ping())
+                {
+                    PingReply result;
+                    try
+                    {
+                        result = ping.Send(IP);
+                    }
+                    catch (PingException)
+                    {
+                        result = null;
+                    }
+                    return result != null && result.Status == IPStatus.Success;
+                }
             }
         }