From 20f0ccb2112bfa6ba68d22b1be29d727a1cf7ad3 Mon Sep 17 00:00:00 2001
From: "chris.watts90@outlook.com" <chris.watts90@outlook.com>
Date: Fri, 21 Apr 2017 08:03:32 +0100
Subject: [PATCH] fix null reference error when configuration setting specified
 by "keyName" parameter doesnt exist.

#79
---
 .../ConfigurationHandler/ConfigurationHandler.cs             | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/DataCenter_Windows/WindowsDataCenter/ConfigurationHandler/ConfigurationHandler.cs b/DataCenter_Windows/WindowsDataCenter/ConfigurationHandler/ConfigurationHandler.cs
index 0359e05..d10e35c 100644
--- a/DataCenter_Windows/WindowsDataCenter/ConfigurationHandler/ConfigurationHandler.cs
+++ b/DataCenter_Windows/WindowsDataCenter/ConfigurationHandler/ConfigurationHandler.cs
@@ -1,4 +1,5 @@
 using System.Configuration;
+using System.Linq;
 
 namespace ConfigurationHandler
 {
@@ -7,7 +8,9 @@ namespace ConfigurationHandler
         public static string GetConfiguration(string keyName)
         {
             var appSettings = ConfigurationManager.OpenExeConfiguration(System.Reflection.Assembly.GetEntryAssembly().Location).AppSettings;
-            return appSettings.Settings[keyName].Value;
+            if(appSettings.Settings.AllKeys.Contains(keyName))
+                return appSettings.Settings[keyName].Value;
+            return string.Empty;
         }
     }
 }