Index: src/DeltaShell/DeltaShell.Core/DeltaShellApplicationSettings.cs
===================================================================
diff -u -r8f6ae890fed8e8eae3a32f9c0498a10f82e0ddf9 -r5fc71a385897af92ccb092f2f969b5709afab85a
--- src/DeltaShell/DeltaShell.Core/DeltaShellApplicationSettings.cs	(.../DeltaShellApplicationSettings.cs)	(revision 8f6ae890fed8e8eae3a32f9c0498a10f82e0ddf9)
+++ src/DeltaShell/DeltaShell.Core/DeltaShellApplicationSettings.cs	(.../DeltaShellApplicationSettings.cs)	(revision 5fc71a385897af92ccb092f2f969b5709afab85a)
@@ -4,7 +4,7 @@
 namespace DeltaShell.Core
 {
     // Decoration class for settings with IsDirty flag (speed-up exit)
-    public class DeltaShellApplicationSettings : System.Configuration.ApplicationSettingsBase
+    public class DeltaShellApplicationSettings : ApplicationSettingsBase
     {
         private readonly ApplicationSettingsBase child;
 
@@ -13,18 +13,21 @@
             this.child = child;
         }
 
-        public bool IsDirty { get; private set; }
-
         public override object this[string propertyName]
         {
-            get { return child[propertyName]; }
+            get
+            {
+                return child[propertyName];
+            }
             set
             {
                 child[propertyName] = value;
                 IsDirty = true;
                 //don't forget to publish changes
-                OnPropertyChanged(this,new PropertyChangedEventArgs(propertyName));
+                OnPropertyChanged(this, new PropertyChangedEventArgs(propertyName));
             }
         }
+
+        public bool IsDirty { get; private set; }
     }
 }
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