View difference between Paste ID: WyKn1vbW and 3BT5CT5U

 //Will redo in MVVM later, but the quick and dirty method
 //Autocomplete with filtering added
 //Fixed issue with duplicate and empty history items
 
 // In View.xaml:
 <ComboBox Name="NovellHistory" HorizontalAlignment="Left" Margin="50,28,0,0" VerticalAlignment="Top" Width="200" IsEditable="True">
             <ComboBox.Style>
                 <Style>
                     <EventSetter Event="TextBox.TextChanged" Handler="History_TextChanged" />
                 </Style>
             </ComboBox.Style>
         </ComboBox>
 
 
 // In View.cs:
 public NovellDesktopView()
         {
             InitializeComponent();
             NovellHistory.ItemsSource = Settings.NovellHistory;
         }
 
         private void Run_Click(object sender, RoutedEventArgs e)
         {
             var history = Settings.NovellHistory;
             Settings.NovellHistory = AddHistoryItem(history, NovellHistory.Text);
         }
 
-            output.Add(item);
+
         {
             var output = new List<string>();
             if (!input.Contains(item) && item.Length > 0)
                 output.Add(item);
             output.AddRange(input);
             if (output.Count >= 10)
                 output.RemoveAt(9);
             return output;
         }
 
         private void History_TextChanged(object sender, TextChangedEventArgs e)
         {
             var box = (ComboBox)sender;
             box.ItemsSource = from entry in Settings.NovellHistory where entry.ToLower().Contains(box.Text.ToLower()) select entry;
             box.IsDropDownOpen = true;
         }
 
 //In Settings.Designer.cs
         [global::System.Configuration.UserScopedSettingAttribute()]
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
         [global::System.Configuration.DefaultSettingValueAttribute("")]
         public System.Collections.Generic.List<string> NovellHistory
         {
             get {
                 return ((System.Collections.Generic.List<string>)(this["NovellHistory"]));
             }
             set {
                 this["NovellHistory"] = value;
             }
         }
 
 //In my Settings.cs class (because I hate typing out Properties.Settings.Default.SomeSetting)
         public static List<string> NovellHistory
         {
             get { return Properties.Settings.Default.NovellHistory; }
             set { Properties.Settings.Default.NovellHistory = value; Properties.Settings.Default.Save(); }
         }