diff --git a/AutoUpdater.NET/AutoUpdater.cs b/AutoUpdater.NET/AutoUpdater.cs
index 173834f8..8b451122 100644
--- a/AutoUpdater.NET/AutoUpdater.cs
+++ b/AutoUpdater.NET/AutoUpdater.cs
@@ -362,13 +362,13 @@ private static void BackgroundWorkerDoWork(object sender, DoWorkEventArgs e)
 
                                     XmlNode appArgs = item.SelectSingleNode("args");
 
-                                    args.InstallerArgs = appArgs?.InnerText ?? String.Empty;
+                                    args.InstallerArgs = appArgs?.InnerText;
 
                                     XmlNode checksum = item.SelectSingleNode("checksum");
 
-                                    args.HashingAlgorithm = checksum?.Attributes["algorithm"]?.InnerText ?? "MD5";
+                                    args.HashingAlgorithm = checksum?.Attributes["algorithm"]?.InnerText;
 
-                                    args.Checksum = checksum?.InnerText ?? String.Empty;
+                                    args.Checksum = checksum?.InnerText;
                                 }
                             }
                         }
@@ -402,9 +402,9 @@ private static void BackgroundWorkerDoWork(object sender, DoWorkEventArgs e)
             ChangelogURL = args.ChangelogURL = GetURL(webResponse.ResponseUri, args.ChangelogURL);
             DownloadURL = args.DownloadURL = GetURL(webResponse.ResponseUri, args.DownloadURL);
             Mandatory = args.Mandatory;
-            InstallerArgs = args.InstallerArgs;
-            HashingAlgorithm = args.HashingAlgorithm;
-            Checksum = args.Checksum;
+            InstallerArgs = args.InstallerArgs ?? String.Empty;
+            HashingAlgorithm = args.HashingAlgorithm ?? "MD5";
+            Checksum = args.Checksum ?? String.Empty;
 
             webResponse.Close();
 
diff --git a/AutoUpdaterTest/FormMain.cs b/AutoUpdaterTest/FormMain.cs
index 0ea30630..4484b935 100644
--- a/AutoUpdaterTest/FormMain.cs
+++ b/AutoUpdaterTest/FormMain.cs
@@ -23,9 +23,10 @@ public FormMain()
 
         private void FormMain_Load(object sender, EventArgs e)
         {
-            //Uncomment below line to handle parsing logic of non XML AppCast file.
+            //Uncomment below lines to handle parsing logic of non XML AppCast file.
 
             //AutoUpdater.ParseUpdateInfoEvent += AutoUpdaterOnParseUpdateInfoEvent;
+            //AutoUpdater.Start("http://rbsoft.org/updates/AutoUpdaterTest.json");
 
             //Uncomment below line to run update process using non administrator account.