Changes from review

src/MahApps.Metro.Samples/MahApps.Metro.Demo/ExampleViews/MultiSelectionComboBoxExample.xaml

@@ -1,34 +1,28 @@
-<!-- 
-    Licensed to the .NET Foundation under one or more agreements.
-    The .NET Foundation licenses this file to you under the MIT license.
-    See the LICENSE file in the project root for more information. 
--->
-
-    <UserControl x:Class="MetroDemo.ExampleViews.MultiSelectionComboBoxExample"
+<UserControl x:Class="MetroDemo.ExampleViews.MultiSelectionComboBoxExample"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:local="clr-namespace:MetroDemo"
-             xmlns:local1="clr-namespace:MetroDemo.ExampleViews"
              xmlns:mah="http://metro.mahapps.com/winfx/xaml/controls"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:system="clr-namespace:System;assembly=mscorlib"
              d:DataContext="{d:DesignInstance local:MainWindowViewModel}"
              d:DesignHeight="450"
              d:DesignWidth="800"
              mc:Ignorable="d">
+
     <UserControl.Resources>
         <Style BasedOn="{StaticResource MahApps.Styles.MetroHeader.Horizontal}" TargetType="mah:MetroHeader" />
         <Style BasedOn="{StaticResource MahApps.Styles.GroupBox}" TargetType="GroupBox">
-            <Setter Property="Margin" Value="5,5,5,0" />
+            <Setter Property="Margin" Value="5 5 5 0" />
         </Style>
 
         <!--  Selection Order  -->
-        <ObjectDataProvider x:Key="Demo.Enums.OrderSelectedItemsBy"
+        <ObjectDataProvider x:Key="Demo.Enums.SelectedItemsOrderType"
                             MethodName="GetValues"
-                            ObjectType="{x:Type system:Enum}">
+                            ObjectType="{x:Type mah:SelectedItemsOrderType}">
             <ObjectDataProvider.MethodParameters>
-                <x:Type TypeName="mah:OrderSelectedItemsBy" />
+                <x:Type TypeName="mah:SelectedItemsOrderType" />
             </ObjectDataProvider.MethodParameters>
         </ObjectDataProvider>
 
@@ -146,7 +140,7 @@
                             <ComboBox ItemsSource="{Binding Source={StaticResource Demo.Enums.SelectionMode}}" SelectedItem="{Binding ElementName=mscb_Example, Path=SelectionMode}" />
                         </mah:MetroHeader>
                         <mah:MetroHeader Header="OrderSelectedItemsBy">
-                            <ComboBox ItemsSource="{Binding Source={StaticResource Demo.Enums.OrderSelectedItemsBy}}" SelectedItem="{Binding ElementName=mscb_Example, Path=OrderSelectedItemsBy}" />
+                            <ComboBox ItemsSource="{Binding Source={StaticResource Demo.Enums.SelectedItemsOrderType}}" SelectedItem="{Binding ElementName=mscb_Example, Path=OrderSelectedItemsBy}" />
                         </mah:MetroHeader>
                         <mah:MetroHeader Header="ObjectToStringComparer">
                             <ComboBox SelectedValue="{Binding ElementName=mscb_Example, Path=ObjectToStringComparer}" SelectedValuePath="Tag">

src/MahApps.Metro.Samples/MahApps.Metro.Demo/MainWindowViewModel.cs

@@ -239,19 +239,8 @@ public void Dispose()
 
         public int SelectedIndex { get; set; }
 
-
         public ICollection<Album> Albums { get; set; }
 
-
-        private Album _MultiSelectionComboBoxSelectedAlbum;
-        [Display(Prompt = "Select an Album")]
-        public Album MultiSelectionComboBoxSelectedAlbum
-        {
-            get { return _MultiSelectionComboBoxSelectedAlbum; }
-            set { _MultiSelectionComboBoxSelectedAlbum = value; OnPropertyChanged(nameof(MultiSelectionComboBoxSelectedAlbum)); }
-        }
-
-
         public List<Artist> Artists { get; set; }
 
         private ObservableCollection<Artist> _selectedArtists = new ObservableCollection<Artist>();
@@ -682,8 +671,14 @@ private void ToggleIconScaling(object obj)
             "Zebra"
         };
 
-        [Display(Prompt = "Select your favoite animal(s)")]
-        public string MyFavoriteAnimal { get; set; }
+        private object myFavoriteAnimal;
+
+        [Display(Prompt = "Select your favorite animal(s)")]
+        public object MyFavoriteAnimal
+        {
+            get => this.myFavoriteAnimal;
+            set => this.Set(ref this.myFavoriteAnimal, value);
+        }
 
         public ObjectParser MyObjectParser {get;} 
     }

src/MahApps.Metro.Samples/MahApps.Metro.Demo/Models/Album.cs

@@ -5,7 +5,6 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
-using System.Globalization;
 using System.Linq;
 using MetroDemo.Core;
 

src/MahApps.Metro.Samples/MahApps.Metro.Demo/Models/ObjectParser.cs

@@ -4,13 +4,7 @@
 
 using MahApps.Metro.Controls;
 using MahApps.Metro.Controls.Dialogs;
-using System;
-using System.Collections.Generic;
 using System.Globalization;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
 
 namespace MetroDemo.Models
 {
@@ -39,7 +33,7 @@ public object CreateObjectFromString(string input, CultureInfo culture, string s
                 DefaultButtonFocus = MessageDialogResult.Affirmative
             };
 
-            if (_dialogCoordinator.ShowModalMessageExternal(_mainWindowViewModel, "Add Animal", $"Do you want to add \"{input}\" to the animals list?",  MessageDialogStyle.AffirmativeAndNegative, dialogSettings) == MessageDialogResult.Affirmative)
+            if (this._dialogCoordinator.ShowModalMessageExternal(this._mainWindowViewModel, "Add Animal", $"Do you want to add \"{input}\" to the animals list?",  MessageDialogStyle.AffirmativeAndNegative, dialogSettings) == MessageDialogResult.Affirmative)
             {
                 return input.Trim();
             }

src/MahApps.Metro/Controls/Helper/BindingHelper.cs

@@ -16,20 +16,20 @@ public static class BindingHelper
         /// <summary>
         /// A dummy property to initialize the binding to evaluate
         /// </summary>
-        private static readonly DependencyProperty DummyProperty = DependencyProperty.RegisterAttached(
-            "Dummy",
-            typeof(object),
-            typeof(BindingHelper),
-            new UIPropertyMetadata(null));
+        private static readonly DependencyProperty DummyProperty
+            = DependencyProperty.RegisterAttached("Dummy",
+                                                  typeof(object),
+                                                  typeof(BindingHelper),
+                                                  new UIPropertyMetadata(null));
 
         /// <summary>
         /// A dummy property to initialize the binding to evaluate. This property supports also string format.
         /// </summary>
-        private static readonly DependencyProperty DummyTextProperty = DependencyProperty.RegisterAttached(
-            "DummyText",
-            typeof(string),
-            typeof(BindingHelper),
-            new UIPropertyMetadata(null));
+        private static readonly DependencyProperty DummyTextProperty
+            = DependencyProperty.RegisterAttached("DummyText",
+                                                  typeof(string),
+                                                  typeof(BindingHelper),
+                                                  new UIPropertyMetadata(null));
 
         /// <summary>
         /// Evaluates a defined <see cref="Binding"/>-path on the given object
@@ -48,7 +48,7 @@ public static object Eval(object source, string expression)
         /// </summary>
         /// <param name="source">the object to evaluate</param>
         /// <param name="expression">the binding expression to evaluate</param>
-        /// <param name="format">the stringformat to use</param>
+        /// <param name="format">the string format to use</param>
         /// <returns>the result of the <see cref="Binding"/></returns>
         public static object Eval(object source, string expression, string format)
         {
@@ -70,29 +70,29 @@ public static object Eval(Binding binding, object source)
             }
 
             Binding newBinding = new Binding
-            {
-                Source = source,
-                AsyncState = binding.AsyncState,
-                BindingGroupName = binding.BindingGroupName,
-                BindsDirectlyToSource = binding.BindsDirectlyToSource,
-                Path = binding.Path,
-                Converter = binding.Converter,
-                ConverterCulture = binding.ConverterCulture,
-                ConverterParameter = binding.ConverterParameter,
-                FallbackValue = binding.FallbackValue,
-                IsAsync = binding.IsAsync,
-                Mode = BindingMode.OneWay,
-                StringFormat = binding.StringFormat,
-                TargetNullValue = binding.TargetNullValue
-            };
+                                 {
+                                     Source = source,
+                                     AsyncState = binding.AsyncState,
+                                     BindingGroupName = binding.BindingGroupName,
+                                     BindsDirectlyToSource = binding.BindsDirectlyToSource,
+                                     Path = binding.Path,
+                                     Converter = binding.Converter,
+                                     ConverterCulture = binding.ConverterCulture,
+                                     ConverterParameter = binding.ConverterParameter,
+                                     FallbackValue = binding.FallbackValue,
+                                     IsAsync = binding.IsAsync,
+                                     Mode = BindingMode.OneWay,
+                                     StringFormat = binding.StringFormat,
+                                     TargetNullValue = binding.TargetNullValue
+                                 };
             return Eval(newBinding);
         }
 
         /// <summary>
         /// Evaluates a defined <see cref="Binding"/> on the given <see cref="DependencyObject"/>
         /// </summary>
         /// <param name="binding">The <see cref="Binding"/> to evaluate</param>
-        /// <param name="dependencyObject">optional: The <see cref="DependencyObject"/> to evalutate</param>
+        /// <param name="dependencyObject">optional: The <see cref="DependencyObject"/> to evaluate</param>
         /// <returns>The resulting object</returns>
         public static object Eval(Binding binding, DependencyObject dependencyObject)
         {
@@ -120,4 +120,4 @@ public static object Eval(Binding binding)
             return Eval(binding, null);
         }
     }
-}
+}

src/MahApps.Metro/Controls/MultiSelectionComboBox/ICompareObjectToString.cs

@@ -19,17 +19,14 @@ public interface ICompareObjectToString
         /// <param name="input">The string to compare</param>
         /// <param name="objectToCompare">The object to compare</param>
         /// <param name="stringComparison">The <see cref="StringComparison"/> used to check if the string matches</param>
-        /// <param name="stringFormat">The string format to applay</param>
-        /// <returns>true if the string represents the object, otherwise fase.</returns>
+        /// <param name="stringFormat">The string format to apply</param>
+        /// <returns>true if the string represents the object, otherwise false.</returns>
         public bool CheckIfStringMatchesObject(string input, object objectToCompare, StringComparison stringComparison, string stringFormat);
     }
 
-
     [MarkupExtensionReturnType(typeof(DefaultObjectToStringComparer))]
     public class DefaultObjectToStringComparer : MarkupExtension, ICompareObjectToString
     {
-        private static DefaultObjectToStringComparer _Instance; 
-
         /// <inheritdoc/>
         public bool CheckIfStringMatchesObject(string input, object objectToCompare, StringComparison stringComparison, string stringFormat)
         {
@@ -63,7 +60,7 @@ public bool CheckIfStringMatchesObject(string input, object objectToCompare, Str
         /// <inheritdoc/>
         public override object ProvideValue(IServiceProvider serviceProvider)
         {
-            return _Instance ??= new DefaultObjectToStringComparer();
+            return this;
         }
     }
-}
+}

src/MahApps.Metro/Controls/MultiSelectionComboBox/IParseStringToObject.cs

@@ -16,8 +16,8 @@ public interface IParseStringToObject
         /// </summary>
         /// <param name="input">The input string to parse</param>
         /// <param name="culture">The culture which should be used to parse</param>
-        /// <param name="stringFormat">The string format to applay</param>
+        /// <param name="stringFormat">The string format to apply</param>
         /// <returns>The object if successful, otherwise null</returns>
         object CreateObjectFromString(string input, CultureInfo culture, string stringFormat);
     }
-}
+}