Add IssueOptions panel.

src/AddIns/BackendBindings/CSharpBinding/Project/CSharpBinding.addin

@@ -118,10 +118,13 @@
 		                class                = "CSharpBinding.CSharpProjectBinding" />
 	</Path>
 	
-	<Path path = "/SharpDevelop/Dialogs/OptionsDialog/TextEditorOptions">
+	<Path path = "/SharpDevelop/Dialogs/OptionsDialog/CodingOptions">
 		<OptionPanel id    = "C#"
 		             insertafter = "Highlighting"
 		             label = "C#">
+			<OptionPanel id="Issues"
+			             label="Code inspection"
+			             class="CSharpBinding.Refactoring.IssueOptions"/>
 			<ContextActionOptionPanel id="ContextActions" path="/SharpDevelop/ViewContent/TextEditor/C#/ContextActions"/>
 		</OptionPanel>
 	</Path>

src/AddIns/BackendBindings/CSharpBinding/Project/CSharpBinding.csproj

@@ -66,8 +66,13 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Configuration\AssemblyInfo.cs" />
+    <Compile Include="Src\Refactoring\IssueOptions.xaml.cs">
+      <DependentUpon>IssueOptions.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
     <Compile Include="Src\Refactoring\CSharpContextActionWrapper.cs" />
     <Compile Include="Src\Refactoring\IssueManager.cs" />
+    <Compile Include="Src\Refactoring\IssueOptionsViewModel.cs" />
     <Compile Include="Src\Refactoring\SDScript.cs" />
     <EmbeddedResource Include="Resources\BuildOptions.xfrm" />
     <EmbeddedResource Include="Resources\MyNamespaceSupportForCSharp.cs" />
@@ -129,15 +134,28 @@
       <Name>ICSharpCode.Core</Name>
       <Private>False</Private>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\..\Main\ICSharpCode.Core.Presentation\ICSharpCode.Core.Presentation.csproj">
+      <Project>{7E4A7172-7FF5-48D0-B719-7CD959DD1AC9}</Project>
+      <Name>ICSharpCode.Core.Presentation</Name>
+      <Private>False</Private>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\..\Main\ICSharpCode.Core.WinForms\ICSharpCode.Core.WinForms.csproj">
       <Project>{857CA1A3-FC88-4BE0-AB6A-D1EE772AB288}</Project>
       <Name>ICSharpCode.Core.WinForms</Name>
       <Private>False</Private>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\..\Main\ICSharpCode.SharpDevelop.Widgets\Project\ICSharpCode.SharpDevelop.Widgets.csproj">
+      <Project>{8035765F-D51F-4A0C-A746-2FD100E19419}</Project>
+      <Name>ICSharpCode.SharpDevelop.Widgets</Name>
+      <Private>False</Private>
+    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Src\Completion" />
     <Folder Include="Src\Refactoring" />
   </ItemGroup>
+  <ItemGroup>
+    <Page Include="Src\Refactoring\IssueOptions.xaml" />
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.Targets" />
 </Project>

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/CSharpCodeActionProviderDoozer.cs

@@ -76,8 +76,7 @@ namespace CSharpBinding.Refactoring
 			}
 			
 			public string Category {
-				get { return string.IsNullOrEmpty(attribute.Category) ? attribute.Title[0].ToString() : attribute.Category; }
+				get { return attribute.Category ?? string.Empty; }
-				// get { return attribute.Category ?? string.Empty; }
 			}
 			
 			public bool AllowHiding {

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/IssueManager.cs

@@ -7,10 +7,12 @@ using System.Diagnostics;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using System.Windows;
 using System.Windows.Media;
 using CSharpBinding.Parser;
 using ICSharpCode.Core;
 using ICSharpCode.NRefactory;
+using ICSharpCode.NRefactory.CSharp;
 using ICSharpCode.NRefactory.CSharp.Refactoring;
 using ICSharpCode.NRefactory.Editor;
 using ICSharpCode.SharpDevelop.Editor;
@@ -25,8 +27,65 @@ namespace CSharpBinding.Refactoring
 	/// </summary>
 	public class IssueManager : IDisposable, IContextActionProvider
 	{
-		static readonly Lazy<IList<ICodeIssueProvider>> issueProviders = new Lazy<IList<ICodeIssueProvider>>(
+		static readonly Lazy<IReadOnlyList<IssueProvider>> issueProviders = new Lazy<IReadOnlyList<IssueProvider>>(
-			() => AddInTree.BuildItems<ICodeIssueProvider>("/SharpDevelop/ViewContent/TextEditor/C#/IssueProviders", null, false));
+			() => AddInTree.BuildItems<ICodeIssueProvider>("/SharpDevelop/ViewContent/TextEditor/C#/IssueProviders", null, false)
+			.Select(p => new IssueProvider(p)).ToList());
+		
+		internal static IReadOnlyList<IssueProvider> IssueProviders {
+			get { return issueProviders.Value; }
+		}
+		
+		internal class IssueProvider
+		{
+			readonly ICodeIssueProvider provider;
+			public readonly Type ProviderType;
+			public readonly IssueDescriptionAttribute Attribute;
+			
+			public IssueProvider(ICodeIssueProvider provider)
+			{
+				if (provider == null)
+					throw new ArgumentNullException("provider");
+				this.provider = provider;
+				this.ProviderType = provider.GetType();
+				var attributes = ProviderType.GetCustomAttributes(typeof(IssueDescriptionAttribute), true);
+				if (attributes.Length == 1)
+					this.Attribute = (IssueDescriptionAttribute)attributes[0];
+			}
+			
+			public Severity DefaultSeverity {
+				get { return Attribute != null ? Attribute.Severity : Severity.Hint; }
+			}
+			
+			public IssueMarker DefaultMarker {
+				get { return Attribute != null ? Attribute.IssueMarker : IssueMarker.Underline; }
+			}
+			
+			public IEnumerable<CodeIssue> GetIssues(BaseRefactoringContext context)
+			{
+				return provider.GetIssues(context);
+			}
+		}
+		
+		public static IReadOnlyDictionary<Type, Severity> GetIssueSeveritySettings()
+		{
+			// TODO: cache the result
+			var dict = new Dictionary<Type, Severity>();
+			var prop = PropertyService.Get("CSharpIssueSeveritySettings", new Properties());
+			foreach (var provider in issueProviders.Value) {
+				dict[provider.ProviderType] = prop.Get(provider.ProviderType.FullName, provider.DefaultSeverity);
+			}
+			return dict;
+		}
+		
+		public static void SetIssueSeveritySettings(IReadOnlyDictionary<Type, Severity> dict)
+		{
+			var prop = new Properties();
+			foreach (var pair in dict) {
+				prop.Set(pair.Key.FullName, pair.Value);
+			}
+			PropertyService.Set("CSharpIssueSeveritySettings", prop);
+		}
+		
 		readonly ITextEditor editor;
 		readonly ITextMarkerService markerService;
 		
@@ -50,14 +109,15 @@ namespace CSharpBinding.Refactoring
 		sealed class InspectionTag
 		{
 			readonly IssueManager manager;
-			public readonly ICodeIssueProvider Provider;
+			public readonly IssueProvider Provider;
 			public readonly ITextSourceVersion InspectedVersion;
 			public readonly string Description;
 			public readonly int StartOffset;
 			public readonly int EndOffset;
 			public readonly IReadOnlyList<IContextAction> Actions;
+			public readonly Severity Severity;
 			
-			public InspectionTag(IssueManager manager, ICodeIssueProvider provider, ITextSourceVersion inspectedVersion, string description, int startOffset, int endOffset, IEnumerable<CodeAction> actions)
+			public InspectionTag(IssueManager manager, IssueProvider provider, ITextSourceVersion inspectedVersion, string description, int startOffset, int endOffset, Severity severity, IEnumerable<CodeAction> actions)
 			{
 				this.manager = manager;
 				this.Provider = provider;
@@ -65,6 +125,7 @@ namespace CSharpBinding.Refactoring
 				this.Description = description;
 				this.StartOffset = startOffset;
 				this.EndOffset = endOffset;
+				this.Severity = severity;
 				
 				this.Actions = actions.Select(Wrap).ToList();
 			}
@@ -105,11 +166,34 @@ namespace CSharpBinding.Refactoring
 					return;
 				marker = markerService.Create(startOffset, endOffset - startOffset);
 				marker.ToolTip = this.Description;
-				marker.MarkerType = TextMarkerType.SquigglyUnderline;
+				switch (Provider.DefaultMarker) {
-				marker.MarkerColor = Colors.Blue;
+					case IssueMarker.Underline:
+						Color underlineColor = GetColor(this.Severity);
+						underlineColor.A = 186;
+						marker.MarkerType = TextMarkerType.SquigglyUnderline;
+						marker.MarkerColor = underlineColor;
+						break;
+					case IssueMarker.GrayOut:
+						marker.ForegroundColor = SystemColors.GrayTextColor;
+						break;
+				}
 				marker.Tag = this;
 			}
 			
+			static Color GetColor(Severity severity)
+			{
+				switch (severity) {
+					case Severity.Error:
+						return Colors.Red;
+					case Severity.Warning:
+						return Colors.Orange;
+					case Severity.Suggestion:
+						return Colors.Green;
+					default:
+						return Colors.Blue;
+				}
+			}
+			
 			public void RemoveMarker()
 			{
 				if (marker != null) {
@@ -163,7 +247,14 @@ namespace CSharpBinding.Refactoring
 						var compilation = ParserService.GetCompilationForFile(parseInfo.FileName);
 						var resolver = parseInfo.GetResolver(compilation);
 						var context = new SDRefactoringContext(textSource, resolver, new TextLocation(0, 0), 0, 0, cancellationToken);
+						var settings = GetIssueSeveritySettings();
 						foreach (var issueProvider in issueProviders.Value) {
+							Severity severity;
+							if (!settings.TryGetValue(issueProvider.ProviderType, out severity))
+								severity = Severity.Hint;
+							if (severity == Severity.None)
+								continue;
+							
 							foreach (var issue in issueProvider.GetIssues(context)) {
 								results.Add(new InspectionTag(
 									this,
@@ -172,6 +263,7 @@ namespace CSharpBinding.Refactoring
 									issue.Desription,
 									context.GetOffset(issue.Start),
 									context.GetOffset(issue.End),
+									severity,
 									issue.Action != null ? new [] { issue.Action } : new CodeAction[0]));
 							}
 						}

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/IssueOptions.xaml

@@ -0,0 +1,42 @@
+<gui:OptionPanel x:Class="CSharpBinding.Refactoring.IssueOptions"
+                 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                 xmlns:sd="http://icsharpcode.net/sharpdevelop/core"
+                 xmlns:nr="clr-namespace:ICSharpCode.NRefactory.CSharp;assembly=ICSharpCode.NRefactory.CSharp"
+                 xmlns:gui="clr-namespace:ICSharpCode.SharpDevelop.Gui;assembly=ICSharpCode.SharpDevelop">
+	<DockPanel>
+		<!-- TODO: Translate -->
+		<CheckBox Name="featureEnabledCheckBox" DockPanel.Dock="Top"
+		          IsEnabled="False"
+		          IsChecked="True" Content="Enable code inspection" />
+		<sd:RestrictDesiredSize Margin="0, 4, 0, 0">
+			<ListBox Name="listBox"
+			         HorizontalContentAlignment="Stretch"
+			         IsEnabled="{Binding IsChecked, ElementName=featureEnabledCheckBox}">
+				<ListBox.ItemTemplate>
+					<DataTemplate>
+						<DockPanel>
+							<ComboBox DockPanel.Dock="Right"
+							          MinWidth="85"
+							          VerticalAlignment="Center"
+							          gui:EnumBinding.EnumType="{x:Type nr:Severity}"
+							          SelectedValue="{Binding Severity}"/>
+							<sd:RestrictDesiredSize RestrictHeight="False" MinWidth="150">
+								<TextBlock Text="{Binding DisplayName}" ToolTip="{Binding ToolTip}" TextWrapping="WrapWithOverflow" />
+							</sd:RestrictDesiredSize>
+						</DockPanel>
+					</DataTemplate>
+				</ListBox.ItemTemplate>
+				<ListBox.GroupStyle>
+					<GroupStyle>
+						<GroupStyle.HeaderTemplate>
+							<DataTemplate DataType="Group">
+								<TextBlock FontWeight="Bold" Text="{Binding Name}" />
+							</DataTemplate>
+						</GroupStyle.HeaderTemplate>
+					</GroupStyle>
+				</ListBox.GroupStyle>
+			</ListBox>
+		</sd:RestrictDesiredSize>
+	</DockPanel>
+</gui:OptionPanel>

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/IssueOptions.xaml.cs

@@ -0,0 +1,64 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using ICSharpCode.NRefactory.CSharp;
+using ICSharpCode.SharpDevelop.Gui;
+using ICSharpCode.SharpDevelop.Refactoring;
+
+namespace CSharpBinding.Refactoring
+{
+	/// <summary>
+	/// Interaction logic for IssueOptions.xaml
+	/// </summary>
+	public partial class IssueOptions : OptionPanel
+	{
+		ObservableCollection<IssueOptionsViewModel> viewModels;
+		
+		public IssueOptions()
+		{
+			InitializeComponent();
+			viewModels = new ObservableCollection<IssueOptionsViewModel>(
+				from p in IssueManager.IssueProviders
+				where p.Attribute != null
+				select new IssueOptionsViewModel(p.ProviderType, p.Attribute)
+			);
+			ICollectionView view = CollectionViewSource.GetDefaultView(viewModels);
+			if (viewModels.Any(p => !string.IsNullOrEmpty(p.Category)))
+				view.GroupDescriptions.Add(new PropertyGroupDescription("Category"));
+			listBox.ItemsSource = view;
+		}
+		
+		public override void LoadOptions()
+		{
+			base.LoadOptions();
+			var settings = IssueManager.GetIssueSeveritySettings();
+			foreach (var m in viewModels) {
+				Severity severity;
+				if (settings.TryGetValue(m.ProviderType, out severity))
+					m.Severity = severity;
+			}
+		}
+		
+		public override bool SaveOptions()
+		{
+			Dictionary<Type, Severity> dict = new Dictionary<Type, Severity>();
+			foreach (var m in viewModels) {
+				dict[m.ProviderType] = m.Severity;
+			}
+			IssueManager.SetIssueSeveritySettings(dict);
+			return base.SaveOptions();
+		}
+	}
+}

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/IssueOptionsViewModel.cs

@@ -0,0 +1,47 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.ComponentModel;
+using ICSharpCode.NRefactory.CSharp;
+using ICSharpCode.SharpDevelop.Widgets;
+
+namespace CSharpBinding.Refactoring
+{
+	public class IssueOptionsViewModel : ViewModelBase
+	{
+		readonly Type providerType;
+		readonly IssueDescriptionAttribute attribute;
+		
+		public IssueOptionsViewModel(Type providerType, IssueDescriptionAttribute attribute)
+		{
+			this.providerType = providerType;
+			this.attribute = attribute;
+			this.Severity = attribute.Severity;
+		}
+		
+		public Type ProviderType {
+			get { return providerType; }
+		}
+		
+		// TODO: Translate
+		public string DisplayName {
+			get { return attribute.Title; }
+		}
+		
+		public string ToolTip {
+			get { return attribute.Description; }
+		}
+		
+		public string Category {
+			get { return attribute.Category; }
+		}
+		
+		Severity severity;
+		
+		public Severity Severity {
+			get { return severity; }
+			set { SetAndNotifyPropertyChanged(ref severity, value); }
+		}
+	}
+}

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/ContextActions/ContextActionOptions.xaml

@@ -6,18 +6,28 @@
 	<DockPanel>
 		<!-- TODO: Translate -->
 		<CheckBox Name="featureEnabledCheckBox" DockPanel.Dock="Top"
+		          IsEnabled="False"
 		          IsChecked="True" Content="Enable context actions" />
 		<sd:RestrictDesiredSize Margin="0, 4, 0, 0">
-			<ListBox x:Name="listBox" SelectionMode="Multiple"
+			<ListBox Name="listBox" SelectionMode="Multiple"
+			         IsEnabled="{Binding IsChecked, ElementName=featureEnabledCheckBox}"
 			         ItemContainerStyle="{x:Static sd:GlobalStyles.ListBoxItemFocusHighlightStyle}">
 				<ListBox.ItemTemplate>
 					<DataTemplate>
 						<!-- The checkbox is toggling the actual IsSelected property on the container (ListBoxItem), so it'll update ListBox.SelectedItems -->
 						<CheckBox Content="{Binding DisplayName}"
-						          IsEnabled="{Binding IsChecked, ElementName=featureEnabledCheckBox}"
 						          IsChecked="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type ListBoxItem}},Path=IsSelected}" />
 					</DataTemplate>
 				</ListBox.ItemTemplate>
+				<ListBox.GroupStyle>
+					<GroupStyle>
+						<GroupStyle.HeaderTemplate>
+							<DataTemplate DataType="Group">
+								<TextBlock FontWeight="Bold" Text="{Binding Name}" />
+							</DataTemplate>
+						</GroupStyle.HeaderTemplate>
+					</GroupStyle>
+				</ListBox.GroupStyle>
 			</ListBox>
 		</sd:RestrictDesiredSize>
 	</DockPanel>

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/ContextActions/ContextActionOptions.xaml.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
 using System.Text;
 using System.Windows;
@@ -27,7 +28,10 @@ namespace ICSharpCode.AvalonEdit.AddIn.ContextActions
 		{
 			InitializeComponent();
 			this.providers = providers.ToArray();
-			listBox.ItemsSource = this.providers;
+			ICollectionView view = CollectionViewSource.GetDefaultView(this.providers);
+			if (this.providers.Any(p => !string.IsNullOrEmpty(p.Category)))
+				view.GroupDescriptions.Add(new PropertyGroupDescription("Category"));
+			listBox.ItemsSource = view;
 		}
 		
 		public override void LoadOptions()

src/Main/Base/Project/Src/Gui/Dialogs/ReferenceDialog/ServiceReference/AddServiceReferenceViewModel.cs

@@ -256,7 +256,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return title; }
 			set {
 				title = value;
-				base.RaisePropertyChanged(() => Title);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -268,7 +268,8 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return discoverButtonContent; }
 			set {
 				discoverButtonContent = value;
-				base.RaisePropertyChanged(() => DiscoverButtonContent);
+				OnPropertyChanged();
+				OnPropertyChanged();
 			}
 		}
 		
@@ -276,7 +277,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return mruServices; }
 			set {
 				mruServices = value;
-				base.RaisePropertyChanged(() => MruServices);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -284,7 +285,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return selectedService; }
 			set {
 				selectedService = value;
-				base.RaisePropertyChanged(() => SelectedService);
+				OnPropertyChanged();
 			}
 		}
 	
@@ -292,7 +293,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return items; }
 			set {
 				items = value;
-				base.RaisePropertyChanged(() => ServiceItems);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -301,7 +302,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			set {
 				myItem = value;
 				UpdateListView();
-				base.RaisePropertyChanged(() => ServiceItem);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -309,7 +310,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return serviceDescriptionMessage; }
 			set {
 				serviceDescriptionMessage = value;
-				base.RaisePropertyChanged(() => ServiceDescriptionMessage);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -317,7 +318,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return defaultNameSpace; }
 			set {
 				defaultNameSpace = value;
-				base.RaisePropertyChanged(() => DefaultNameSpace);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -325,7 +326,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return twoValues; }
 			set {
 				twoValues = value;
-				base.RaisePropertyChanged(() => TwoValues);
+				OnPropertyChanged();
 			}
 		}
 		

src/Main/Base/Project/Src/Gui/Dialogs/ReferenceDialog/ServiceReference/AdvancedServiceViewModel.cs

@@ -85,7 +85,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return selectedModifier; }
 			set {
 				selectedModifier = value;
-				base.RaisePropertyChanged(() => SelectedModifier);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -95,7 +95,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return generateAsyncOperations; }
 			set {
 				generateAsyncOperations = value;
-				base.RaisePropertyChanged(() => GenerateAsyncOperations);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -105,7 +105,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return generateMessageContract; }
 			set {
 				generateMessageContract = value;
-				base.RaisePropertyChanged(() => GenerateMessageContract);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -115,7 +115,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return collectionType; }
 			set {
 				collectionType = value;
-				base.RaisePropertyChanged(() => CollectionType);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -125,7 +125,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return dictionaryCollectionType; }
 			set {
 				dictionaryCollectionType = value;
-				base.RaisePropertyChanged(() => DictionaryCollectionType);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -136,7 +136,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			set { 
 				useReferencedAssemblies = value;
 				ReuseTypes = useReferencedAssemblies;
-				base.RaisePropertyChanged(() => UseReferencedAssemblies);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -146,7 +146,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return reuseTypes; }
 			set {
 				reuseTypes = value;
-				base.RaisePropertyChanged(() => ReuseTypes);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -157,7 +157,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			set { 
 				reuseReferencedTypes = value;
 				ListViewEnable = value;
-				base.RaisePropertyChanged(() => ReuseReferencedTypes);
+				OnPropertyChanged();
 			}
 		}
 		
@@ -167,7 +167,7 @@ namespace ICSharpCode.SharpDevelop.Gui.Dialogs.ReferenceDialog.ServiceReference
 			get { return listViewEnable; }
 			set {
 				listViewEnable = value;
-				base.RaisePropertyChanged(() => ListViewEnable);
+				OnPropertyChanged();
 			}
 		}
 		

src/Main/Base/Project/Src/Gui/Dialogs/TabbedOptions.cs

@@ -28,9 +28,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 					if (descriptor.HasOptionPanel) {
 						this.Items.Add(new OptionTabPage(this, descriptor));
 					}
-					if (descriptor.ChildOptionPanelDescriptors != null) {
+					AddOptionPanels(descriptor.ChildOptionPanelDescriptors);
-						AddOptionPanels(descriptor.ChildOptionPanelDescriptors);
-					}
 				}
 			}
 			OnIsDirtyChanged(null, null);

src/Main/Base/Project/Src/Gui/Dialogs/TreeViewOptionsDialog.xaml.cs

@@ -136,7 +136,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 				get {
 					if (IsActive)
 						return PresentationResourceService.GetBitmapSource("Icons.16x16.SelectionArrow");
-					if (OptionPanelDescriptor.ChildOptionPanelDescriptors != null) {
+					if (OptionPanelDescriptor.ChildOptionPanelDescriptors.Any()) {
 						if (IsExpanded)
 							return PresentationResourceService.GetBitmapSource("Icons.16x16.OpenFolderBitmap");
 						else
@@ -152,12 +152,8 @@ namespace ICSharpCode.SharpDevelop.Gui
 			public List<OptionPanelNode> Children {
 				get {
 					if (children == null) {
-						if (OptionPanelDescriptor.ChildOptionPanelDescriptors != null) {
+						children = OptionPanelDescriptor.ChildOptionPanelDescriptors
-							children = OptionPanelDescriptor.ChildOptionPanelDescriptors
+							.Select(op => new OptionPanelNode(op, this)).ToList();
-								.Select(op => new OptionPanelNode(op, this)).ToList();
-						} else {
-							children = new List<OptionPanelNode>();
-						}
 					}
 					return children;
 				}

src/Main/Base/Project/Src/Internal/Doozers/DefaultOptionPanelDescriptor.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using ICSharpCode.Core;
 
 namespace ICSharpCode.SharpDevelop
@@ -23,7 +24,7 @@ namespace ICSharpCode.SharpDevelop
 		
 		public IEnumerable<IOptionPanelDescriptor> ChildOptionPanelDescriptors {
 			get {
-				return optionPanelDescriptors;
+				return optionPanelDescriptors ?? Enumerable.Empty<IOptionPanelDescriptor>();
 			}
 		}
 		

src/Main/Core/Project/Src/Services/PropertyService/Properties.cs

@@ -7,6 +7,7 @@ using System.Collections.Generic;
 using System.ComponentModel;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using System.Text;
 using System.Xml;
 using System.Xml.Serialization;
@@ -72,10 +73,7 @@ namespace ICSharpCode.Core
 		{
 			get {
 				lock (properties) {
-					List<string> ret = new List<string>();
+					return properties.Keys.ToArray();
-					foreach (KeyValuePair<string, object> property in properties)
-						ret.Add(property.Key);
-					return ret.ToArray();
 				}
 			}
 		}

src/Main/ICSharpCode.Core.Presentation/RestrictDesiredSize.cs

@@ -14,19 +14,48 @@ namespace ICSharpCode.Core.Presentation
 	/// </summary>
 	public class RestrictDesiredSize : Decorator
 	{
-		Size lastArrangeSize = new Size(double.NaN, double.NaN);
+		public static readonly DependencyProperty RestrictWidthProperty =
+			DependencyProperty.Register("RestrictWidth", typeof(bool), typeof(RestrictDesiredSize),
+			                            new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsArrange));
 		
+		public bool RestrictWidth {
+			get { return (bool)GetValue(RestrictWidthProperty); }
+			set { SetValue(RestrictWidthProperty, value); }
+		}
+		
+		public static readonly DependencyProperty RestrictHeightProperty =
+			DependencyProperty.Register("RestrictHeight", typeof(bool), typeof(RestrictDesiredSize),
+			                            new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsArrange));
+		
+		public bool RestrictHeight {
+			get { return (bool)GetValue(RestrictHeightProperty); }
+			set { SetValue(RestrictHeightProperty, value); }
+		}
+		
+		Size lastArrangeSize = new Size(double.PositiveInfinity, double.PositiveInfinity);
+		Size lastMeasureSize = new Size(double.NaN, double.NaN);
+
 		protected override Size MeasureOverride(Size constraint)
 		{
-			return new Size(0, 0);
+			if (RestrictWidth && RestrictHeight)
+				return new Size(0, 0);
+			
+			if (RestrictWidth && constraint.Width > lastArrangeSize.Width)
+				constraint.Width = lastArrangeSize.Width;
+			if (RestrictHeight && constraint.Height > lastArrangeSize.Height)
+				constraint.Height = lastArrangeSize.Height;
+			lastMeasureSize = constraint;
+			Size baseSize = base.MeasureOverride(constraint);
+			return new Size(RestrictWidth ? 0 : baseSize.Width, RestrictHeight ? 0 : baseSize.Height);
 		}
 		
 		protected override Size ArrangeOverride(Size arrangeSize)
 		{
-			if (lastArrangeSize != arrangeSize) {
+			if (lastMeasureSize != arrangeSize) {
-				lastArrangeSize = arrangeSize;
+				lastMeasureSize = arrangeSize;
 				base.MeasureOverride(arrangeSize);
 			}
+			lastArrangeSize = arrangeSize;
 			return base.ArrangeOverride(arrangeSize);
 		}
 	}

src/Main/ICSharpCode.SharpDevelop.Widgets/Project/ViewModelBase.cs

@@ -2,73 +2,35 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq.Expressions;
 using System.Reflection;
+using System.Runtime.CompilerServices;
 
 namespace ICSharpCode.SharpDevelop.Widgets
 {
 	/// <summary>
-	/// Description of ViewModelBase.
+	/// Base class for view models; implements INotifyPropertyChanged.
 	/// </summary>
-	public class ViewModelBase:INotifyPropertyChanged
+	public class ViewModelBase : INotifyPropertyChanged
 	{
-		public ViewModelBase()
-		{
-		}
-		
-		
 		public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;
 
-		protected virtual void OnPropertyChanged(System.ComponentModel.PropertyChangedEventArgs e)
+		protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
 		{
 			var handler = this.PropertyChanged;
-			if (handler != null)
+			if (handler != null) {
-			{
+				handler(this, new PropertyChangedEventArgs(propertyName));
-				handler(this, e);
 			}
 		}
 		
-		
+		protected void SetAndNotifyPropertyChanged<T>(ref T field, T newValue, [CallerMemberName] string propertyName = null)
-		protected void RaisePropertyChanged<T>(Expression<Func<T>> propertyExpresssion)
-		{
-			var propertyName = ExtractPropertyName(propertyExpresssion);
-			this.RaisePropertyChanged(propertyName);
-		}
-
-		
-		protected void RaisePropertyChanged(String propertyName)
-		{
-			OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
-		}
-		
-		
-		private static String ExtractPropertyName<T>(Expression<Func<T>> propertyExpresssion)
 		{
-			if (propertyExpresssion == null)
+			if (!EqualityComparer<T>.Default.Equals(field, newValue)) {
-			{
+				field = newValue;
-				throw new ArgumentNullException("propertyExpresssion");
+				OnPropertyChanged(propertyName);
-			}
-
-			var memberExpression = propertyExpresssion.Body as MemberExpression;
-			if (memberExpression == null)
-			{
-				throw new ArgumentException("The expression is not a member access expression.", "propertyExpresssion");
 			}
-
-			var property = memberExpression.Member as PropertyInfo;
-			if (property == null)
-			{
-				throw new ArgumentException("The member access expression does not access a property.", "propertyExpresssion");
-			}
-
-			var getMethod = property.GetGetMethod(true);
-			if (getMethod.IsStatic)
-			{
-				throw new ArgumentException("The referenced property is a static property.", "propertyExpresssion");
-			}
-
-			return memberExpression.Member.Name;
 		}
 	}
 }